Rescan your computer again in a couple of days with both SAS and your antivirus program.
Remove temporary files, logs, cookies, etc. by using Ccleaner. Do not use "Advanced Settings" or the "Issues" button. Use only the default settings. During installation you will be offered the Yahoo toolbar. Be sure to uncheck if you don't want it.http://www.ccleaner.com/
If no malware is found after rescanning, delete your system restore points because some are infected. If you ever need to use "system restore" in the future they could reinfect your computer unless removed. Instructions (if you need them) are in the link below.http://www.bleepingcomputer.com/tutorials/windows-xp-system-restore-guide/