Video Card Problems (alot)

[UnKnownEnemy]

Hi
I have alot problems with my video card
1)Thet when i`m finishing useing tv(at 1024*768) , turning it off(switching it to one monitor) and turning to 1280*1024 so thene the desktop turns black and i can see onle the mouse icon and there nothing i can do.
2)It happens the same when i`m clicking on the nvidia icon in the bottom of the screen neer the clock , but in this case it returns to normal after a sec.
3)The same issu happens when i`m pressing right mouse boton on a video file like *.AVI the screen turn black for a sec and then returns to normal.

What can i do about it?

Thenks

 

[almerac]

first whats your computer build. and when did this start happening. i would think its a driver issue, so a quick removal and reinstall couldnt hurt just to see.