Thank you for your reponse. I updated MBAM and ran the quick scan, the log follows. When I ran ComboFix, I first got the message in the attached screenshot about a rootkit. After ComboFix deleted that (it took awhile), it asked me to restart, which I did and ran it again. The log is also below. When I tried to run DDS again, I got an error about "illegal operation attempted on a registry key that has been marked for deletion." I got this error on everything I tried to open. I was logged in as Administrator, so I logged in to another user account and was able to run DDS. That log is also below. Malwarebytes' Anti-Malware 1.50.1.1100 www.malwarebytes.org Database version: 6463 Windows 6.0.6002 Service Pack 2 Internet Explorer 8.0.6001.19048 4/28/2011 10:50:56 AM mbam-log-2011-04-28 (10-50-56).txt Scan type: Quick scan Objects scanned: 166120 Time elapsed: 7 minute(s), 56 second(s) Memory Processes Infected: 0 Memory Modules Infected: 0 Registry Keys Infected: 0 Registry Values Infected: 0 Registry Data Items Infected: 0 Folders Infected: 0 Files Infected: 0 Memory Processes Infected: (No malicious items detected) Memory Modules Infected: (No malicious items detected) Registry Keys Infected: (No malicious items detected) Registry Values Infected: (No malicious items detected) Registry Data Items Infected: (No malicious items detected) Folders Infected: (No malicious items detected) Files Infected: (No malicious items detected) ComboFix 11-04-27.03 - Administrator 04/28/2011 11:27:17.1.2 - x86 Microsoft