hello,
i just installed Crysis 2 Limited Edition onto Windows 7. I tried running the game when EA updater ran to install the first patch. After a successful patch, I tried running the game again when AVG Anti-Virus Free Edition 2011 told me the Crysis2.exe file was infected. It doesn't tell me the name of the virus. It only says "Virus found in win32/Heur". What are my options? Remove threats or just let it be? Reinstall?

AVG is wrong. It's a false positive. The encryption that the game uses makes AVG think that it is a virus, when it is not. Mark it as safe or turn of AVG for now. Or better yet, get a different Virus Scanner. Microsoft Security Essentials is great and free.

my kaspersky 2011 didnt catch any virus from crysis ! its false positive

win32/Heur indicates that your anti-virus THINKS it is an infection because the executable has some behaviors that other infections have used in the past.

Open AVG, at the top click Tools, click Advanced Settings. On the left side is a
list, find PUP Exceptions.

Now you need to click Add Exception and browse to the
directory you installed crysis 2. There will be two files you have to add exceptions
for...

Crysis2.exe and Crysis2Launcher.exe

Be sure to click Apply and then Ok when done. Now you should be able to run the
program without issue.

had that problem too when installing the game, updated avg and now doesn't detect anything.