I don’t know if it is reltated to the same thing, but a few weeks ago I wanted to install AIS and Avast didn’t install and re-started my PC giving me a blue screen, the worst thing is that when I wanted to go back to the free version it happened the samething.

I solved it uninstalling the file Microsoft Visual C ++ 2008 redistributable x86 9.0.30729.4148 That comes with Avast… After uninstalling this file, evertything went fine.

rm