An update that was intended to fix several issues seems to have brought some new ones with it.

Windows Update is causing issues for people yet again. This time, it's Windows 10 KB4535996 that's causing some people's PCs to experience slow boot times. Additionally, the Sign tool app is crashing for some, with others reporting lower frame rates and stuttering in games. Windows 10 KB4535996 was an optional update that fixed several issues, but it appears to have brought some new ones with it.

Windows Latest and TechRadar reported the issue earlier today. Additionally, a person on Reddit shared their own issues with the update a few days ago. TechRadar also reports in some extreme cases, PCs can get stuck in a boot loop. It's worth noting that Windows 10 should give you the option to boot your PC in Safe Mode if it fails multiple times. You can then uninstall the update.

Luckily, since Windows 10 KB4535996 was an optional update, many people probably don't have it on their system. If you did install it and are now experiencing any of these issues, you can easily uninstall it with these steps:

1. Select the Start button or Windows Desktop Search and type "update history" and select "View your Update history".
2. On the Settings/View update history dialog window, select "Uninstall Updates".
3. On the Installed Updates dialog window, find and select KB4535996 and select the "Uninstall" button.
4. Restart your device.

Microsoft has had several update-related issues over the last few months. We'll have to keep an eye out to see if this is a continuing trend or a spurt of isolated incidents.