We have looked into the issue that you described, where the system slows down after a Windows update, and have found a way to fix it.
We have recently released an update that should fix this issue. Your Antivirus Pro will be automatically updated, and you don’t have to do anything else in the product.
If you have uninstalled the incompatible Windows Update, you can now restore it using the Windows Update function.
Affected Windows Updates
- Windows 10: KB4493509
- Windows 7: KB4493472, KB4493448