Windows 10 runs slow after installing KB4559309 update

Symptoms: 1.  Startup time and loading are very slow.

2. Attempted to uninstall the update may be failed with this message it is required and cannot be removed.

3. The new Edge browser has messed up the fonts so some sites are almost unreadable. Everything is very thin and pixelated. It also somehow affected google chrome, the fonts are just as bad there now.

4. After installing this update (on windows 2004) office products suddenly use up 25-40% of the CPU. 

5. Since this update downloaded, my mouse cursor disappears but clicks on tabs randomly, closing things, selecting text, deleting text, opening and closing programs – it’s an absolute mess.

6. Slow performance.

7. Crashes or BSOD.


Resolution: 1. uninstalling the KB Update KB:4559309 using wusa command. Here is how.
1. Type cmd in the search box
2. Right click on it and the select run as administrator.
3. In Command Prompt, type this command wusa /uninstall /kb:[id]
Example: wusa /uninstall /KB:4559309
4. Press Enter enter.

5. Now perform Clean Boot. In the search bar, type msconfig.

6. In the General of System Configuration Utility, check the selective startup and make sure that load system service and load startup items both have checked mark.

7. Click on services tab

8. Select on Hide All Microsoft Services.

9. Once Hide all Microsoft Services have checked mark on it, click on Disable All

10. Click on the Startup Tab and then click open task manager.

11. Disable all application that you don’t want to run in this troubleshooting.

12. Click OK , Apply the settings.

10. Restart your pc and test it.

Resolution 2: Try system restore.

Resolution 3: In one case, after re-installing the chipset drivers everything seems to be operating normally

Resolution 4: In another case, install Windows 10 version 2004 and the latest updates.

Resolution 5:  The problem can be fixed by reinstalling the motherboard drivers or install latest the motherboard driver.

Resolution 6: Disabling BitLocker and everything went back to normal.

Resolution 7: Uninstall new Edge Chromium by opening cmd and then typing 

“C:\Program Files (x86)\Microsoft\Edge\Application\83.0.478.56\Installer\setup.exe” –uninstall –system-level –verbose-logging

In bold it can be possible that you have an older version, then change version number accordingly like in “C:\Program Files (x86)\Microsoft\Edge\Application”Reply 

Published by

Bob Lin

Bob Lin, Chicagotech-MVP, MCSE & CNE Data recovery, Windows OS Recovery, Networking, and Computer Troubleshooting on http://www.ChicagoTech.net How to Install and Configure Windows, VMware, Virtualization and Cisco on http://www.HowToNetworking.com

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