I just installed 4.7 Home, all was working just fine till then, but Kasperty was expiring and avast was recommended. I am using Windows XP and completed the installation smoothly. It was scanning, I went for coffee and upon my return, ny computer re-booted, and re-booted continually. I tried a manual shut down - no change. I cannot stay on long enough to delete 4.7, or even a system restore. I am not computer literate, so, if anyone can help, please keep it simple - like explaining to your mom.