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Windows 10 21H2 Running slow after Windows update ? Here how to fix!

Laptop Running very slow after the windows 10 21H2 update? System freezes for a long time at startup or windows 10 not responding mouse clicks after November 2021 update? For some others, Windows 10 fails to boot after Update, crashes with different Blue screen errors or stuck at black screen with a cursor. All these problems indicate updates not installed properly, the recent update is not compatible with your current system, Windows System files get corrupted etc. If you are also struggling with this problem, “windows 10 very slow and unresponsive” here are some effective tips to help speed up Windows 10 performance.


Windows 10 Running slow

Microsoft regularly releases cumulative updates with refinements. Install the latest windows update that may contain the bug fix causing windows not responding or freezes.

  1. Press Windows + I to open windows settings,

  2. Click Update & security than Windows update,

  3. Now click check for updates button to install the latest windows updates.

  4. After that restart windows and check windows running smoothly.

A virus, malware, or malicious software also causes your PC to run slowly. Other symptoms include unexpected pop-up messages, programs that unexpectedly start automatically, or the sound of your hard disk constantly working. The best way to handle viruses and malicious software is to try to prevent them by running antimalware and

antivirus software and keeping it up to date.

Perform a clean boot

A clean boot is performed to start Windows by using a minimal set of drivers and startup programs. This helps eliminate software conflicts that occur when you install a program or an update or when you run a program in Windows 10. You may also troubleshoot or determine what conflict is causing the problem by performing a clean boot.

  1. Press Windows + R, type msconfig and ok to open the system configuration utility

  2. On the General tab, click Selective startup.

  3. Clear the Load startup items check box.

  4. Click the Services tab.

  5. Select the Hide all Microsoft services checkbox (at the bottom).

  6. Click Disable all, click OK.

  7. Restart Windows, and check windows running smoothly.

  8. If yes then one of the services causing the problem.

Repair Corrupt System Files

Most of the time Corrupt system files cause a number of problems to the windows 10 system like blue screen error, the system not responding, apps not open, show different error codes while open explorer or any application. And may this windows 10 not responding problem occur due to corrupt system files. We recommend checking your system files using the windows system file checker Utility.

  1. Type cmd on start menu search,

  2. from search results Right-click on the command prompt select run as administrator,

  3. Type command sfc /scannow and press enter key.

  4. This will start scanning windows system files for corruption.

  5. If found any the sfc utility attempts to repair it by copying a cached copy of each corrupted file from the %WinDir% \system32\dllcache folder.

  6. Wait until 100% complete the scanning process.

system file checker utility Windows 10

If no corrupted system files were found in the previous state, then I suggest you try the following steps:

  1. Again open the command prompt and run the DISM command below

                DISM.exe /Online /Cleanup-image /Restorehealth

  1. This will repair Windows images, including those used for Windows PE, Windows Recovery Environment (Windows RE), and Windows Setup.

  2. Close the command prompt and restart the PC and check if it works.

Disable background apps

Microsoft is a big fan of its native universal apps, which might be why it allows them to run in the background even when you haven’t actually launched them. That means you can access their features more quickly, but it’s a waste of system resources. And when most of the system resources used by background apps then also system may cause the windows 10 not responding problem.

  1. Press Windows + I to open windows settings,

  2. Click on privacy then Background apps,

  3. Turn off the toggle switches next to the apps you don’t want to have running all the time.

  4. Of course, you can still launch these programs manually if you need them.

Disable Background Apps

Change the paging file size to improve performance

The paging file is an area on your hard disk that Windows uses like memory. Increasing the paging file size can help improve your PC’s performance.

  1. In the search box on the taskbar, type advanced system, and then select View advanced system settings, which has Control panel listed underneath it.

  2. In System Properties, on the Advanced tab, select Settings in the Performance area.

  3. In Performance Options, select Advanced > Change in the Virtual memory area.

  4. Clear the Automatically manage paging file size for all drives check box.

  5. Select Custom size, then enter an initial size (in MB) and maximum size in the corresponding boxes.

  6. Select Set > OK.

  7. Restart your PC by selecting Start   > Power  > Restart.

Use your PC then see if it’s running better. If it’s not, try the next tip.

Note: To Calculate the pagefile size always Initial size is one and a half (1.5) x the amount of total system memory. The maximum size is three (3) x the initial size. So let’s say you have 4 GB (1 GB = 1,024 MB x 4 = 4,096 MB) of memory. The initial size would be 1.5 x 4,096 = 6,144 MB and the maximum size would be 3 x 4,096 = 12,207 MB.

Adjust your virtual memory settings

Adjust the appearance and performance of Windows

Windows 10 includes many visual effects, such as animations and shadow effects. These look great, but they can also use additional system resources and can slow down your PC—this is especially true if you have a PC with a smaller amount of memory (RAM).

To adjust the visual effects in Windows

  1. In the search box on the taskbar, type performance, then select Adjust the appearance and performance of Windows.

  2. On the Visual Effects tab, select Adjust for best performance > Apply.

  3. Restart your PC and see if that speeds up your PC.

Adjust Visual Effects

Update Installed Device Driver

After Upgrade to Windows 10 21H2 update, Some of your programs and drivers may work without issues, but some may just become incompatible of which the most common one affected is the Video/Graphics driver. There are other causes as well aside from Video/Graphics drivers but since this is the most common one. We recommend to check and install the latest driver software for your current windows version.

  1. Press Windows + X key on the keyboard,

  2. Go to device manager,

  3. Expand Display Adapter,

Right-click on the installed graphics driver, select Update Driver Software,

  1. Click Search automatically for updated driver software and let windows to check and install the latest driver software for you.

Update display driver

Or visit the device manufacturers’ website, download and install the latest display/graphic/video and audio/sound/Realtek drivers. Restart windows and check windows running smoothly.

Did these solutions help to optimize windows 10 1903 performance? Let us know on comments below, also read:


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