Screen Tearing

If this is in the wrong section I'm extremely sorry.
 
I'm having issues with screen tearing. Be it in video games or full screen Quick Look's. Its more noticeable during cut scenes especially when fast movement occurs. Is this a monitor issue, or a computer issue?  Really bad during Silent Hill 3 but I figured that was because I'm on Vista. But even during Borderlands I get the same thing.
 
 

I've updated the drivers. I do not have two monitors. I don't think the CPU is topping out when it plays. I've got a

NVIDIA GeForce GTS 250
AMD Phenom 9600 Quad Core

You have to turn V-Sync on probably.

I hate screen tearing. 
 
It's a new thing to me, because I don't remember my N64 games having screen tearing.

" You have to turn V-Sync on probably. "

" @Chyro said:

" You have to turn V-Sync on probably. "

Under the settings for V-Sync it says "Use the 3D Application Settings".   Should I turn it to Force on? "

" You have to turn V-Sync on probably. "

" @Chyro:    Should I crank the refresh rate up to 75 as well?  Hmmm what about Antialiasing - Transparency? "

Still getting some issues with Quick Looks. Need to restart the computer before I'll notice a difference?