Win32:Rootkit-gen Problem.pls help

hi. whenever I started the game “freestyle philippines” an avast warning came up and malware was found.
so what i did was i moved it to the chest then boot scan as what the Avast program recomended. Then i tried to open the control panel then suddenly crashed and it didn’t open. So I do a System restore and i can now open the cnrtl panel.

I think it came from the game cuz its the 2nd time it happened

Here’s what the pop up contains:

file name:C:\DOCUME~1\JayR’s\LOCALS~1\Temp\mc25.tmp
malware: Win32:Rootkit-gen [Rtk]
walware type: rootkit
VPS version: 080725-0, 07/25/2008

Is there anything i can do without this pop up coming whenever i play the game? or should i just uninstall the online game and system restore the only solution?

tnx in advance!

To know if a file is a false positive, please submit it to VirusTotal and let us know the result. If it is indeed a false positive, send it in a password protected zip to virus@avast.com. VirusTotal has a file size limit of 10Mb. Please, mention in the body of the message why you think it is a false positive and the password used. Thanks.

Also, check other threads about the mc*.tmp files that are opened to discussion.
For instance: http://forum.avast.com/index.php?topic=37357.msg312840#msg312840 and http://forum.avast.com/index.php?topic=37353.0;topicseen