If you have Windows 7 set to automatically update every Tuesday, it’s time to permanently disable that feature with a vengeance. Microsoft has just confirmed that a recent update — specifically KB 3004394 — is causing a range of serious problems and recommends removing it.
The first issue that caught my attention, via AMD’s Robert Hallock, is that KB 3004394 blocks the installation or update of graphics drivers such as AMD’s new Catalyst Omega. Nvidia users are also reporting difficulty installing GeForce drivers, though I can’t confirm this personally as my machines are all Windows 8.1. Hallock recommended manually uninstalling the update, advice now echoed officially by Microsoft.
Edit: KB3024777 patch removes the KB3004394 patch and you should be alright.