Hi,
I have the same error message. I didnĀ“t reinstall windows, I tried out spybot and some Alwil software, deinstalled avast and installed a new version on a different harddrive. Short time it worked, but now I receive the message again. It first appears by booting Windows at the moment, when I have to type my password.
When I mark "yes", the booting goes on and immidiately after showing the windows background, i am logged off again and windows goes back to the "username and password screen". Then the errormessage pops up again and again.
When I mark "no", windows boots normally and after showing the windows background, the message comes again. When I now mark "no", everything seems to work as usual.
I often use Corel Draw and Corel Photo Paint and at the moment, when I try to start them, they just start for a second and then crash back to desktop. I think they are infected too.