I recently downloaded the World In Conflict: Soviet Assualt 1.011 trainer, but it's giving me the "Windows cannot access the specified device, path, or file. You may not have the appropriate permissions to access the item," even though I have full control privliges.
Compatibility with XP SP2 and Running as Administrator has no effect. (i'm on Windows 7)
However, the Company of Heroes 2.601 and C&C: Generals TFD trainers work just fine.