The short answer is no, it is not a virus.
Sometimes, PE will cause virus detection programs to turn up a false positive for a virus in its scans because of how PE collects its data. If you add the PE folder to your safe list you shouldn't see this message any more.
If you are still concerned, just search through the forum for "virus" or "trogan" and you will see that many have come across this issue...I guess it means that you have a good anti-virus program!
Oh, welcome to the forum...for good info on how to get started check out: Welcome to the Forum - getting started
"There are two rules to success in life: 1. Don't tell people everything you know." - Unknown