Although Microsoft didn't specify all the problems users have been experiencing, AMD's Robert Hallock said the update can prevent the system from installing new graphics drivers—which is particularly troublesome as AMD's feature-stuffed new Catalyst Omega drivers launched the same day the borked Windows update rolled out. According to Infoworld , users on Microsoft's support forums have pointed out a litany of other issues, including failure to launch Windows Defender, problems with running VirtualBox and strange errors from User Account Control.
Windows 7 users urged to uninstall broken update that wreaks havoc on software
Glad not to be using Windows right now.
Also meant to mention that this can prevent Windows Update from working.