I'd recommend disabling your McAfee and giving a shot at some other program as a safeguard. AVG anti-virus is free, and TrendMicro's housecall are both decent and will find things that McAfee misses. If a scan by them doesn't show any problems on your computer, leave AVG or another different AV program running when you load up and play Evony. I'd be interested to know what it finds.