What scan are you running that detects these ?
The [Susp] suffix after the name is suspicious, so I don’t know if that is saying they are infected, but suspicious.

What is the location for these detections ?

I have .net in various versions on both my systems and haven’t seen any detections so far, but I don’t do lots of on-demand scans (which are depreciated in a resident on-access antivirus). I do a weekly scheduled Quick scan on default settings.

I have just run a Quick scan (on my XP Pro system) whilst replying to this topic and no detections, I have virus definitions version 130928-0. If you ensure you have the latest virus definitions version try a scan again.