avast, it seems cannot remove it or recognize it.
Can you send the samples to virus@avast.com ?
You can zip and password the files... Inform a link to this thread and the password used.
You can send the files to Chest and, from there, resend to Alwil for analysis.
Thanks.
It seems to have been in a an anti-adware program called Ad-aware se personal and was installed to a temp file.
Ad-aware is a legitimic application but, maybe, this file is not from it...
Can you post the name and the path of the infected file?
Are you using Windows XP?
Can you schedule a boot-time scanning?
Start avast! > Right click the skin > Schedule a boot-time scanning
Select for scanning archives.
Boot.