hi pal
1/ checked with Avira and Malwarebytes and its ok
2/ win 7*64
3/ most of games .exe ( especially the old ones ) seeing only 2 gb of ram even if you have more. patching the exe makes it to see 4gb. Now i'll tell you a small story. Last January i bought a new motherboard and i increased the ram from
4 gb to 16gb (as you know only win7*64 can recognize it-if you have xp-vista-win 7*32, pc can recognize only 4gb). So i made 2 installations (bob and eto late) and the game was running perfect even i had a lot of planes converted from fs9 such as-wop fw190, wop me 109 spitfire, p-51 cwdt p51 and a lot more. Problems began (a lot of ctd) when i started with pto early and had a lot of scenery -usios ships and of course planes such as wop a6m5 ah f4u ah p38- sky unlimited p38. Then i pissed of cause i had spent a lot of money and i couldn't play. I stopped for a while and started with another sim. There i had the same till someone in the forums gave me the link for that patch. i patched the "game".exe and now runs fine. i'll sent you via pm a youtube link to show you what i mean.
a/make a backup of your cfs2.exe
b/run the patch and guide it to cfs2.exe
give the game a go
hope that helped
cheers