Originally Posted by
glad rag
Bugger, think I have a similar problem.
A fishing website has unwittingly been hosting something nasty in Java apparently and last night PC started displaying multiple windows "store" failure messages, the badness stops only after un-installing AVAST completely and restarts when AVAST is reloaded.
Any hints on online viri checkers that check system before you reload an AV program??
GR
Sorry guys should open eyes more

Malwarebytes
Download it, update it, boot into safe mode with command prompt and navigate to c

program files\malwarebytes' antimalware by using 'cd' commands in the command prompt, then run mbam.exe
Do a full scan, and remove anything it finds that's bad.