disscript.exe - infected or false positive?

About 30 minutes ago, PCTools Personal AV detected "disscript.exe" in my user's temp directory, and claimed that this file was infected. Since it seemed like a nonessential file and I wasn't willing to take a risk, I had the file quarantined.

I did a bit of Googling regarding this file... One page (on ThreatExpert) says it isn't a threat, and normally shows up in temp folders for some reason. Another (on the PrevX homepage) claims it's a worm that executes a malicious payload.

Which is the case? It seems weird that it would be a normal Windows file (though gods know Windows has some stupid habits), but I have trouble believing I managed to get infected with anything so fast.