I always install games to custom locations and run my installers ALWAYS by run as admin xD
And i already checked those security settings, nothing wrong with permissions + i set the ownership to myself as well.
Doesn't even matter if it is or isn't.
Btw, turning off UAC in Win7 after the install is a pain to do since you gotta rumble in the services and registery. I've done that as well so it's completly off.
And not gonna discuss about UAC since everyone got there thoughts about it.
Just to mention that my bud here in the living room is playing and we got the same custom build pc's exept for the GPU's and memory (mhz). Even OS's, UAC's, services, are the same.
Edit: almost forgot to say that i even tried xp/vista compabilities as well. Nothing there.