Summary
W32/Malware is a heuristic detection of something that is possibly malicious software. It is detected by one of the scanning engines in versions starting from F-Secure Internet Security 2007, F-Secure Client Security 7, and our Online Scanner.
If such a detection occurs, you should first make sure that your F-Secure software is completely up-to-date with the latest detection database. If your updates are outdated, the scanning engine may have detected something that has recently been added to the definition files.