I've been trying to make this work since...i would say a year

Never took the time to ask on the web but now i do since i would really like to fix this and also because it make no sense to me whats so ever why it does'nt work.
So here is the problem:
I run Skyrim at ugridtoload=11 because i hate to see things poping up.
My PC runs it rather easily i would say since i have an 2600K @ 4.6 ghz CPU, an SSD drive, 16 gb of RAM and SLI GTX 580 2GB.
But the game will always crash to desktop when i enter certain cells. Around Solitude and somewhere between Riverwood and Falkreath where there's lot of trees. (so its basically almost always ok but just very few cells...but its still ruin the game..)
This is with a fresh install. Tried many many things. Even without mods its doing this. (except ugrid change to 11)
One of my friend is running the game at ugrid=11 without crashes..and his computer is not as high end as mine, so i wonder why on mine its doing this.
If someone has an idea please it would be great!
Thank you.
Jay.