I'm 100% certain that it is a 'false positive' NewHEUR_PE is a 'Heur'istic-based detection.
I will repeat part of a previous post.
Let me explain further. Bitcoin is not
a virus. What you have experienced is know as an anti-virus 'false positive' identification.
"A false positive is identifying a file as a virus when it is not a virus."
This often happens with 'new' software because anti-virus programs have never seen the program before. Anti-virus programs use Heuristic-based detection to try and identify unknown viruses, they basically guess if a program is malicious or not to try and 'protect' your PC.
Anti-virus programs are somewhat simple in this respect, however they must enforce an "It's better to be safe than sorry" policy to secure their customer base.
Maybe one day they will accept Bitcoins as payment for their products.
I'm going to send a copy of the Bitcoin.exe installers to as many security, anti-adware, anti-malware and anti-virus companies as I can find, for clarification.
This will make sure that Bitcoin is put on their 'allowed' list more quickly and will reduce the number of confused new users.