I am cleaning a Win XP system by working through your steps. I have progressed from unable to boot to working through all of your steps. System was not totally clean. Windows tool kept trying to remove Qoolaid, requiring many reboots. Additionally, popups continue -- although fewer than before. Then I installed zonealarm and avg. avg scanned and kept indicating files infected with sality. When I tried to quarantine files, avg warned that these were system files and that the system may not work properly if quarantine. Additionally, each program I install -- zonealarm, avg, ccleaner, spybot, etc. -- disappears. The desktop icons become generic icons; when clicked the flashlight searches and does not find the program. If I look in the installation folder, the program file is gone. All MS Office programs are gone, too. I have the log files and will post if you want. It is a major nuisance to do anything on that machine as it is painfully slow and popups popups popups. Then there is the problem of disappearing programs. I am wondering if I should just reformat and reinstall. Will reformatting and reinstallation of Win XP destroy sality and Qoolaid?