We occasionally get false positives on PingPlotter, but the current build (3.30.1s) looks pretty clean at the moment with most virus scanners as of right now. Here's a Virus Total report:

http://www.virustotal.com/analisis/94839...141d-1268191289

If you have 3.30.0s installed still, that might be getting some false positives. We use a binary integrity verifying tool, "Themida" to make sure PingPlotter is a valid image, and some virus scanners occasionally misunderstand that and report it as Unknown/Packed or similar.

If you're still using 3.30.0s, try upgrading to 3.30.1s (http://www.pingplotter.com/files.html).

- Pete