flashing weird graphics issues

I installed SWAT4 on Vista 32-bit and I'm having some serious graphics issues. The game ran completely perfect on XP. It seems to only happen with graphics involving lights, whether it be lights from the sunlight or lights in the ceiling. I have.. what looks to be.. rendering lines going across the screen in all different patterns that makes a flashing sort of effect. It only happens when I come in to contact with any kind of lighted area in the game (sunlight through windows, etc).
I tried turning off some settings to see if it changed it and it didn't. I can only assume it is caused by Directx 10, but I'm not a developer. :)
Any ideas?

I encountered the same issue when playing DeltaForce Xtreme, I noticed it after installing the Nvidia Vista driver.
"Jenny" wrote in message

I installed SWAT4 on Vista 32-bit and I'm having some serious graphics issues. The game ran completely perfect on XP. It seems to only happen with graphics involving lights, whether it be lights from the sunlight or lights in the ceiling. I have.. what looks to be.. rendering lines going across the screen in all different patterns that makes a flashing sort of effect. It only happens when I come in to contact with any kind of lighted area in the game (sunlight through windows, etc).
I tried turning off some settings to see if it changed it and it didn't. I can only assume it is caused by Directx 10, but I'm not a developer. :)
Any ideas?