Ok, so, I got myself thinking that it was quite some time since I last did a virus scan. So, I ran a boottime scan. Something severe was found in Windows/Install folder, something this tool could not delete, move nor repair. So, I cancelled the scan (since the only choice left was "ignore"), and in search for help I came here. I did first two steps from the guide. I run Malwarebytes tool twice, first time with Flesh scan (log 13-10-18) which deleted one minor problem, secondly with recomended quick scan. It didn't find the one Avast bootscan talked about. I also run OTL, both files attached. However the third step, with aswMBR was a disaster - on first try after 15 minutes it crashed. Windows problem solving of course didn't find a way to fix it. So I run it again. And got bluescreen after two minutes or so. Is it because I didn't turn off Malwarebyte and Avast? Could the download have been corrupted? Or is the infection even more severe than I thought?