Possible malware

I found a folder called F3C1DE9E5E164BA9B8547B53A45E3579.TMP in my home directory (running Vista Home Premium). The folder contained the application file "Wise Custom Calla 44.exe". Checked forums, and found a thread started by someone who'd found a similar folder in the Windows directory with 'Wise Custom Calla.dll" in it. (http://discussions.virtualdr.com/archive/index.php/t-165801.html). I've transferred the folder I found to trash but haven't deleted it yet.

Does anyone know anything about this?