What OS (Win XP/2000, etc) are you using? Have you tried doing your scans in "SAFE MODE
"? Are you doing scans while logged into the Administrator's account
or an account with administrator privileges
" is a troubleshooting mode designed to start Windows with minimal drivers and running processes to diagnose problems with your computer. This means some of the programs that normally run when Windows starts will not run.
The Windows operating system protects files when they are being accessed by an application or a program. Malware writers create programs that can insert itself and hide in these protected areas when the files are being used. Using "Safe Mode" reduces the number of modules requesting files to only the essentials to make your computer functional. This in turn reduces the number of hiding places for malware, making it easier to find and delete the offending files. Using your anti-virus and anti-malware tools, in "Safe Mode" also speeds up the scanning process.
Then get a second opinion by performing one of these online Virus scans
:(The following require Internet Explorer to work. Watch the Address bar in IE. You may receive alerts that "This site might require the following ActiveX control...Click here to install...". Click on that alert and then Click Install ActiveX component.)BitDefender Online Scanner
<- Add a check by "Autoclean"
.ESET Nod32 Online Scanner (Vista compatible)
Your issue does not sound malware related but it won't hurt to double-check.