Windows 7: GeForce 8500GT issue. Plugged in but doesn't work.

So here's the thing. A few days ago I noticed that my PC is slow unlike before. I can not run any games, I can not access NVidia Control Panel and when I check "Display" on dxdiag it does not show the device information. I went to device manager trying to disable/enable the graphic card but it told that the graphic card is turned on but that there are issues because of which the graphic card is not working properly. I tried uninstalling drivers with driver sweep and through device manager. BIOS happen to be alright and also I checked if it's plugged in correctly several times and it is. I really don't know what caused this or when.

When I right click on desktop and go to Properties>Settings, there's usually graphic specs written above the resolution bar but now it doesn't show any. It happens to be that my graphic card is unable to use any resources.

PC Specs:

Intel(R)Core(TM)2Duo CPU
E4600, 2.4 Ghz
GeForce 8500GT 512mb.

I'm running on XP 32 bits. Please help me.

Bump.