Trojans and viruses wil prevent you from performing most cleanup attempts when you are in the windows enviroment. One technique I use is to: 1. remove the hard disk from its original PC. 2. Use an external USB enclosure and attach the Disk to that enclosure. 3. Connect the USB enclosure to another pc which has all the utilities such as Malwarebytes or AVG etc.. 4. Run the cleanup utilities on the disk in the external enclosure. Being that you are not booting from the external disk, the Parasites cannot "see" the native Opsys, This technique can also be used to back-up your data from a failing drive. Nuff Said.