Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.
I think this has happened before with corrupted downloads. Try downloading RC4 again, or if you've still got the RC3 installer, just download the patch.
One of the interesting things I think some of you have overlooked is that, as Intel it moving into the GPU market, and Havok had all these deals for Havok FX, nVidia and ATI may no longer want to work with Havok as they would then be contributing to their competition. Intel buying up Havok puts...