SS 6.4. not working

[Izualik]

Hi I m new on SS forum so HI to everyone ,
I m starting tihs thread, cause I have little problem with instaling SS 6.4.
Things I tried:
I install 6.3. properlly, it s working (by the way great work) and I dont need to disable UAC stuff for Win7 it s working without it. Then I install 6.4. add-on in to the same directory and everythings finished good and properlly. But as soon as I run the 6.4. i get into the first loading screen and the game crashes to Win.
Then I tried to disable UAC or just to gave the game security permision but still nothing helps. I have tried it so far like 8 times without any result.
So I m asking you for a help.

[Byg]

I don't know, but you could try with disabled uac first, then install everything.