Hi Karyn,
- reboot to SafeMode (repeatedly press F8 while booting), then Run a thorough scan with avast, included archive Scanning, and MOVE the file to avast chest
if this doesn't help, please work through the link "VirusRemoval" below in my sig. and
- post a hijackthis-Log here
- report what OnlineScanners have to say on the file, e.g. KAV & RAV