I do computer repairs for friends and family and in the past 4 days 4 have asked me to fix their computers. They are all running windows 8 or 8.1. After logging on the screen goes black The curser still moves but that's as far as it gets.
This appears to have happened after the latest set of windows updates. Does anyone know the exact update that is causing the problem.
I've restored the PC and re installed the updates virtually one at a time creating restore points at each successful restart. The one remaining update which appears to be the culprit is KB3000850. (700+ MB)
A look on the net shows that this has been causing problems for many months in various ways. It was released as important then went to optional when problems were highlighted and is now back as important but not automatically selected in the update page.
There may be an issue with Avast in particular with this update.
I'm hiding this update meantime until I've investigated the other three PC's with the same symptoms.
Would appreciate anyone else's thoughts.
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