Much has been said about the issues with the KB4535996 update for Windows 10. After installation (if it even occurs), there may be ‘blue screens of death’, slow boot times, and drops in FPS in games. There have also been reported failures in SignTool, Explorer, Task Manager, the desktop, and so on. The update even sleep mode.

These shortcomings have been noted for quite some time. But only now has Microsoft partially acknowledged their existence and promised that a fix will be available by mid-March. Specifically, it concerns issues with SignTool, BSODs, as well as slow boot times and performance issues. However, there is currently no temporary solution, so we must wait for the new patch.
At this time, Redmond recommends uninstalling KB4535996, after which you should open the 'Updates and Security' section in the system and pause updates for 7 days. It is assumed that everything should return to normal afterward.
Ironically, the KB4535996 patch was meant to fix several Windows search issues, yet it introduced new failures. We can only hope that future updates will not be as problematic. Meanwhile, there is still the release of Windows 10 (2004) ahead.
Fuente: 3dnews.ru
