Hi, It seems that you are not able to log on to the windows. Is this correct?. I suspect there is some problem in booting. Have you tried to log on to in safe mode. If you could , then download aswmbr.exe from avast and run according to its instructions. If your mbr is affected, it will prompt you to fix the mbr. click the button, if so, and say yes to the warning. If the problem is with mbr, then this will work for you. You have not clearly mentioned that you are not able to get to the windows.