Hello everyone.
I tried all the possibilities but i didn't got any results and the screen is still blank when i run the game on both XP and Vista.
Compatibility Tool didn't worked, I also installed the Movie Player on the game's disk, that didn't worked to.
I heared that a User created patch named chckobo will fix this. is it true or i have to  stick out on installing an ancient OS?

Yeah there is a patch somewhere out there, if you search for the "ultima" edition of FF7 you should find it. Usually it's distributed in pirated copies of the game unfortunately, but you can get it alone if you search enough (or at least, you used to be able to). It prevents a game-ending crash at the gold saucer, I'm not so sure it would fix your problem though. Did you try setting up software rendering in the game options? It's possible your newer video card doesn't work with FF7, but your processor should be more than enough to power the game.

Thanks but i can't find a separate patch. can you help me with this one too?