If you are concerned about a virus in the wallet then the best thing to do is to review, understand, and build the wallet from source.
This does prevent the less nerdy
![Grin](https://bitcointalk.org/Smileys/default/grin.gif)
from performing this method, but I would recommend this method when possible.
I too have found that many antivirus programs have false positives on several alt coin wallets.
I have also found that mining software is identified as viruses, but I really think that IT groups in businesses are marking these as viruses to prevent users from mining on company computers.
Hope this eases your concerns and happy mining!
![Cheesy](https://bitcointalk.org/Smileys/default/cheesy.gif)