On Windows 10, Windows Update is an essential tool that helps you download and install feature updates to improve overall performance, integrate new features, and patch security holes. However, for different reasons, you may sometimes experience problems with this feature, such as errors during download, installation and many more.

Thankfully, if you’re getting errors like 0x80070020, 0x80240438, 0xC19001E2, 0x80070424, 0x80242006, 0x8007000E, 0x80D022, 0x80070070, 0x80096004, 0x80080005, 0x8007000D, or 0x80240034, you can do Windows Update on installation to fix the error. .

How to fix basic Windows Update errors

If you’re trying to update your device and Windows Update isn’t working, you can fix it with just a few basic steps, including Restarting your PC, checking your internet connection, and using this feature to pause updates. Japan.

Restart the device

To Restart your device, follow these steps ddaay:

1. Open Start menu.

2. Press the button Power.

3. Press Restart.

After the reboot, try updating your device again from Windows Update.

Check internet connection

Obviously, if you are not connected to the internet, you cannot download and install the update.

To check if you are connected to the internet:

1. Open Start.

2. Search CMD and open it

3. Enter: ping google.com and press Enter.

4. Confirm your results are the same as shown in the picture.

You can also use a browser to test the internet, but CMD is the most effective method to check the network connection.

If you can’t connect to the internet, that’s your problem, not Windows Update.

Stop Updates

Sometimes, if you’re having trouble downloading updates, pausing and resuming Windows Update can fix it. Really… don’t understand how Windows Update works.

1. Open Settings.

2. Press Update & Security.

3. Press Windows Update.

4. Press next Pause updates for 7 days.

5. Restart the machine.

6. Open again Settings > Updates & Security > Windows Update.

7. Press Resume updates.

Once done, try the test again. If not, then go another way.

Disk Cleanup

Usually, a lack of space can cause errors when trying to update your device. If you need more space to install, try these steps:

1. Open Settings.

2. Press System.

3. Press Storage.

4. Under “Local Disk C:”, press Temporary files.

5. Select the items you want to delete.

Note: Option Downloads will delete the files in the “Downloads” folder. If you have important files, clear this option or back up the files that you want to keep.

6. Press the button Remove files.

If you still don’t have enough space, please download Advanced System Care to clean Windows or increase drive space C.

Using Troubleshooter

Troubleshooter on Windows 10 can diagnose and solve common problems in the system.

1. Open Settings.

2. Press Updates & Security.

3. Press next Troubleshoot.

4. Under “Get up and running”, press Windows Update.

5. Press Run the troubleshooter.

6. When finished running then press Close.

The Troubleshooter will diagnose and resolve any problems it finds, and then you just need to update again.

How to fix Windows Update manually

Installing the most recent update manually can also fix Windows Update problems.

Determine the system type

Before downloading the update, you must confirm whether you are using a 32bit or 64bit version of Windows 10.

1. Open Settings.

2. Press System.

3. Press About.

4. Under “Device specifications”, place System type will tell you if your computer is 32bit or 64bit.

5. Under “Windows specification”, specify the current version of Windows.

You can now proceed to download the latest update.

Install updates manually

1. Open Windows Update History.

2. Choose the right version for Windows 10, for example: version 1909.

3. Confirm the latest update code, for example: KB4530684.

4. Open Microsoft Update Catalog.

5. Find the KB code, for example: KB4530684.

6. Press Download. For example, if you are running the 64bit version, download it from “Windows 10 Version 1903 for x64-based Systems”.

7. Click the download link .msu to save on your device.

After completing the steps, you can proceed to install the update on your computer.

Install updates manually

1. Open Start menu.

2. Search CMD, right click and select Run as administrator.

3. Enter this command and press Enter:

wusa C:\PATH-TO-UPDATE\NAME-OF-UPDATE.msu /quiet /norestart

For example, my installation package is located in the Download folder:

wusa C:\Users\m__la\Downloads\windows10.0-kb4530684-x64_02ab3d424a993fbefa857f5b92999383f56c6986.msu /quiet /norestart

Tips: If you’re lazy and don’t want to enter a name that’s too long, just type Windows10.0-kb already Tab it will fill in the rest on your behalf.

Once done, the update package will install, but you’ll need to restart your device to finish applying the changes. If the application update is successful, Windows Update will most likely start working again.

Repair system files

If you have problems with running Windows Update, most likely the system files are corrupted, which you can repair with the tool. System File Checker (SFC).

1. Open Start.

2. Search CMD, right click select Run as administrator.

3. Enter the following command to edit the system image and Enter:

dism /Online /Cleanup-image /Restorehealth

4. And this command is used to edit the installation file:

sfc /scannow

Once you complete these steps, try running Windows Update again, if that doesn’t work, don’t be sad, this post is long.

How to fix Windows Update skipping update schedule

If you suspect that the error lies with the update and not the installation, you should not install the minor update until the next major release.

To skip an update release, you must hide it from your device with these steps:

1. Open the page Windows Support.

2. Press Download the “Show or hide updates” troubleshooter package now to download.

3. Double-click the file wsuhowhide.diagcab.

4. Press next.

5. Press Hide updates.

6. Select the update that is causing the problem.

7. Press next next.

8. Press Close.

After completing the steps, the update will no longer be available for your device. However, when the next update is available, it will automatically download and install.

How to fix Windows Update installing the latest version

If you are using older versions of Windows 10, you can try upgrading to the latest version to fix many issues in the current version, including Windows Update. While there are many ways to upgrade to the latest version, using the Update Assistant is the easiest method.

1. Open Windows 10 download.

2. Press Update now.

3. Save Update Assistant.

4. Double click on the file Windows10Upgrade to open the software.

5. Press Update Now.

6. Press Next.

7. Press Restart Now.

If your dignity is good enough, you can fix the problem here. Otherwise, don’t despair. Like I said, the post is long.

Reinstall Windows 10!!!

This is the ultimate, as well as legendary way to solve all Windows problems. Although it’s a bit heartbreaking and takes a bit of time.

Create USB to install Windows

Before installing Windows, you need a usb to boot the device and reinstall Windows.

1. Open the page Windows 10 download.

2. Press Download tools now.

3. Save the file Media Creation Tool.

4. Double click on the file MediaCreationToolxxxx.exe.

5. Press Accept.

6. Select Create install media (USB flash drive, DVD, or ISO file) for another PC.

7. Press Next.

8. Press Next.

9. Select USB flash drive.

10. Press Next.

11. Choose your usb.

12. Press Next.

13. Press Finish.

Install Windows 10

Slight warning: This process will erase everything on your computer. Make a careful backup before continuing.

1. Boot into usb

If your computer cannot boot to the usb, try the F1, F2, F3, F10, F12, ESC or Delete keys to enter the boot menu. This is a list of keyboard shortcuts for firms.

2. Press Next.

3. Press Install now.

4. Press I don’t have a product key to continue.

5. Press Next.

6. Select the version you want.

7. Press Next.

8. Select I accept the license terms.

9. Press Next.

10. Press Custom: Install Windows only (Advanced).

11. Select the partition where the old Windows is installed, usually drive 0 and press the . button Delete.

If drive 0 has many partitions, just write and delete all those partitions. Windows will automatically create the partition during the installation process.

12. Press Yes.

13. Select an empty drive (Driver 0 Unallocated Space).

15. Press Next.

Once done, you just need to set up the final steps to complete the Windows setup. And if that doesn’t work, then quit your job.

Tryhackme is a popular hacker training website in recent times. Tryhackme has tons of hacker training courses, not free of course. The price is quite steep at 10$/month. Tryhackme also has a lot of rooms that train in specific areas. One of those Rooms is Shodan.io. So in order for the ad to have the budget to buy the course, just work hard on surfing the web and click ads.

Admin: Another advertisement?

Me: Advertise for web admin.

Admin: Well then, keep going.

Through the following article will help you take the test and practice to better understand how to use Shodan.io site

Link Room Shodan.io

Your task in this Room is very simple. Just read and answer the questions to complete the tasks.

Task 1: Introducing Shodan

Shodan.io is the search engine for anything on the Internet. With shodan.io you can publicly search and access cameras and Pi-holes or even a coffee machine, a lightbulb, and so on and so forth.

Before learning about Shodan.io, one must learn IP and ASN what was before.

IP (Internet Protocol) means network protocol address. Your computer has an IP just like your house has a house number and street name. Hardware devices in the network that want to connect and communicate with each other must have an IP address.

Tryhackme’s IP is 142.93.194.248

Autonomous system number (ASN) is the global identifier of a series of IP addresses. If you are a very very large company like Google, you will probably have your own ASN for all the IP addresses you own.

You can use ultratools to look up ASN by IP. I will get Google’s ASN, please pay attention to use Owner, get the ASN of which only shows Google.

Notice the upper left corner. That black number is the ASN. Now we know that Google’s ASN is AS15169.

Now we pass shodan.io, Remember to register first to be able to search. In the search box, we type ASN:[điền ASN ta muốn tìm kiếm].

It will give us all the results it finds. Imagine, you find the ASN code of a webcam company. Then we do a search on shodan and we’ll find out where all of their webcams are and much more fun, hehe.

Task 2: Getting Started

I will not answer the questions in the task. I want you guys to find the answer on your own.

Verses 1 and 2 you can get in ultratools.

Verses 3 to 6 are all in the shodan.

Task 3: Filters

In the Shodan home page, you can tap “explorer” to see the most searched results. One of those results is the webcam.

Note: It is legal to view some publicly accessible webcams. It’s illegal to try to hack into a webcam with a password. Depending on the country in which you access the webcam, there are different laws. You probably don’t want a second actress.

One of the most voted searches is the database search MYSQL.

Shodan also has a MySQL-specific filter: product:MySQL

Now you can use 2 filters at the same time, ASN and MySQL.

asn:AS14061 product:MySQL

That ASN belongs to Tryhackme. Which Tryhackme’s server is DigitalOcean’s.

Shodan has a lot of powerful filters. My favorite filter is filter vuln, This filter allows you to search for vulnerable IP addresses.

Let’s say I want to find an IP address that is vulnerable to attacks like Eternal Blue:

vuln:ms17-010

However, this filter is only allowed to be used by business users, to prevent users of this filter from breaking.

Here are some filters you can use on Shodan:

• City
• Country
• Geo (coordinates)
• Hostname
• net (based on IP/CIDR)
• os (find the operating system)
• port
• before/after (timeline)

Task 4: Google & Filters

What is the top operating system for MySQL servers in Google’s ASN?
Search: ASN:AS15169 product:MySQL

3rd most popular country for MySQL servers?
Search: Same as above

What is the most popular protocol of nginx?
Search: ASN:AS15169 product:nginx

Most popular city?
Search: ASN:AS15169 country:”US”

Google ASN’s most popular OS in Oaland?
Search: ASN:AS15169 country:”US” city:”oakland”
Is it because Tryhackme hasn’t updated yet? The answer is probably

Windows Server 2008 but Tryhackme received Windows Server 2012.

Using keyword Webcam from explorer, Google has Webcam or not?
Search: ASN:AS15169 webcam
This question has not been updated yet. It should have been, but the answer is now (no).

I searched too much now shodan has run out of search, hihi.

Task 5: Exploring the Shodan API

Shodan.io has an API. If you want to explore Shodan’s API, read posts on how to use the API to hack Pi-Holes.

The API allows you to programmatically search Shodan and get back a list of IP addresses

Your WiFi network is slow, but you don’t know why? With so many wireless devices in our homes today, even the slightest mistake can affect the overall performance of the device. So in this article, I will point out 9 things that can slow down your home Wifi network.

9 things that can slow down your Wi-Fi network

This is 24 ways to fix slow Wifi errorif you encounter the following cases of slow Wifi connection, you can fix it manually.

1. Too many IoT devices in the home (Internet of Things)

Cameras, Google Home Minis, smart bulbs, smart plugs… our homes are increasingly flooded with Internet of Things devices, each of which connects to a WiFi network and uses a separate IP address. .

The average smart bulb won’t send or receive large amounts of data, and older routers simply weren’t designed to handle multiple Wi-Fi devices at once. After a certain time, many IoT devices will slow down your Wifi network.

Solution: If your router is too old, upgrade to a newer generation. I recommend that you buy a router with MU-MIMO technology. In simple terms, this is a technology that allows many devices to connect at the same time, many here can be up to 128 devices.

If you are planning to decorate your home with smart sensors, use Z-Wave if possible. It works on a different frequency than the WiFi network so it won’t cause interference.

2. Wireless network range and signal penetration

Where you place your Wi-Fi router is also the most important factor affecting the speed of your home WiFi network.

Wi-Fi routers transmit both 2.4Ghz (commonly known as b/g/n) and 5Ghz (ac) signals. Faster 5GHz network. So why don’t you just disable the 2.4GHz network? Simply because the 2.4GHz signal can penetrate walls and other objects more easily. Thick concrete floors or walls will completely block the 5Ghz network.

You don’t need to worry about this difference, just understand that wireless speed is affected by objects like walls, so the more stuff there is between your device and your router, the slower your network will be. .

Sometimes you can’t move the router due to network wires or walls. In this case, if possible, use an in-wall LAN cable to connect to another router.

3. Too many users

I know that your Wifi network is also shared with many other people, like your neighbor or the sister next door.

In addition to the obvious things like computers, phones and tablets, you will also connect smart TVs, smart lights, windows, stuff, all of which can send or receive information. .

You might be surfing the web on your tablet, while Xbox is loading the latest DLC, and Windows is updating.

All of these activities consume some of your bandwidth. And even when you’re not on the network: updates can still happen silently in the background.

Solution: If there’s a particular app or activity that you want to make sure it’s always performing at its best, turn on Quality of Service. This setting in the router will limit a certain amount of bandwidth to a particular device or a particular activity.

4. Old network cable

If your computer is plugged directly into the router or if you have Ethernet cabling in your home, you should check the cables.

While cabling can last for 50 years or more, network cabling has undergone some significant upgrades that will affect data transfer speeds.

The easiest way to check is to look at the cables. You should see the Cat specs somewhere:

• Cat-5 is the slowest and oldest network cable still in use. Speed ​​is limited to 100 Mbps.
• Cat-5e is the most commonly used network cable today, supporting Gigabit Ethernet (1,000 Mbps).
• Cat-6/6a is a commonly used very fast network cable and supports up to 10 Gigabit (10,000 Mbs).

If you are using a Cat-5 network cable, your Ethernet cable may slow down the WiFi network. Network cables can also be quite flimsy. Use a cable tester to make sure the eight wires inside the cable are still connected to the other end.

Solution: Replace any damaged or damaged Cat-5 network cables you find with a Cat-5e or Cat-6 network cable.

5. Are you using Powerline or Wi-Fi Extender

Many people think that the easiest solution to fix Wi-Fi problems is to buy an extender router. Some people even use Powerline technology adapters that allow you to send network signals through a power outlet.

But in my experience, these devices don’t solve the root of the problem and often just make things worse.

Solution: If you have a large home and your WiFi network can’t be covered everywhere, consider a Wi-Fi Mesh system.

6. Congested Wi-Fi Channel

For those in urban areas, apartment complexes specifically, you may be surrounded by hundreds of different WiFi networks. Unfortunately, they all take up some of the available frequency bandwidth.

Solution: You can change the Wifi channel, but anyway, modern routers are smart enough to choose the best channel. You can also plug in a LAN cable for the fastest speeds.

7. ISP’s DNS server is slow

No matter what internet plan you’re paying for, they all use the domain name system (DNS). DNS is used every time you type a web address into your browser: it’s like a directory that stores the web site and the actual IP of the server. By default, you are using the DNS server provided by your ISP, but it is frequently slow and unreliable.

Solution: You can change your DNS server to achieve faster speed and it is also better for your privacy.

8. Because ISP squeezes bandwidth

This is unlikely unless you’re a heavy user, but many ISPs will intentionally slow down your internet if it detects you’re using file-sharing apps or when you’ve reached a certain capacity.

You should know what your usual internet speed is and check it regularly. If you see a significant drop in speed and no errors are reported by your ISP, you may be squeezing that bandwidth by your carrier.

Solution: If you are being squeezed by your network operator, I think the best way is to change to a new carrier. You can also restrict your activity or use a premium network plan. If you’re experiencing bandwidth squeeze because your carrier has found you’re using file-sharing apps, use a VPN to hide your internet activity.

9. Problematic device

If you regularly disconnect from the network after a certain period of time, it is very likely that your computer is faulty, or another device is taking up your bandwidth.

Solution: Restart the device and find out what caused your machine to fail.

Have you found the cause of the slow Wifi network? If not, you can find out These 8 best wifi network analyzer apps to fix internet connection errors Please.

This article will guide you to calculate the transport problem in Excel.

Transport problem in Excel

Use the solver in Excel to find the number of units to be shipped from each factory to each customer to minimize total costs.

Model building

The model we will deal with looks like this in Excel.

Unit: unit

Factory: factory:

Customer: customer

Shipments: Shipments

Demand: demand

1. To construct this transportation problem, answer the following three questions.

a. What decisions will be made? For this problem, we need Excel to figure out how many units are shipped from each factory to each customer.

b. What are the constraints on these decisions? Each factory has a fixed supply and each customer has a fixed demand.

c. What are the overall performance metrics for these decisions? The overall performance metric is the total cost of Shipments, so the goal is to minimize this amount.

2. To make the model easier to understand, we will create named ranges as follows.

3. Add the following function.

Explanation: The SUM functions calculate the total number of goods shipped from each factory (Total Out) for each customer.Total Cost by product of UnitCost and Shipments.

Trial and error

With this formula, the analysis should be easy.

For example, if we transport 100 units from Factory 1 to Customer 1, 200 units from Factory 2 to Customer 2, 100 units from Factory 3 to Customer 1 and 200 units from Factory 3 to Customer 3, Total Out equals Supply and Total In by Demand. This solution has a total cost of 27800.

Solve the model

1. On the Data panel, click Solver.

Enter the solver parameters. The result should match the figure below.

2. Import TotalCost for Objective.

3. Click Min.

4. Import Shipments into Changing Variable Cells

5. Click Add

6. Click Add

7. Select ‘Make Unconstrained Variables Non-Negative’ and select ‘Simplex LP’.

8. Finally, click Solve.

Result/

Optimal solution:

Conclusion: it is optimal to transport 100 pcs from Factory 1 to Customer 2, 100 pcs from Factory 2 to Customer 2, 100 pcs from Factory 2 to Customer 3, 200 pcs from Factory 3 to Customer order 1 and 100 pcs from Factory 3 to Customer 3. This solution for a minimum cost of 26000. Everything is satisfied.

In addition, you can also view many other excel articles here.