Hey there.
Im in some big trouble.. Recently i got a virus which crashed my computer, and i formatted it (from vista). I then installed Windows XP, since i had a CD laying around..
The problem was, however, that i couldn't play any games - I tried Counter strike: Source, Half life and many others, and i found out it was because my graphics were too bad.
I have the GeForce 8600GTM Card, so this could not be true, because i were able to play those games totally smooth before i formatted.
The problem has to be drivers.
I'm running a Fujitsu Siemens laptop, and the problem here is, that they do not allow drivers from NVIDIA itself -
only from their own website, because drivers have to be edited to be useable on those computers..
So, i look at the website.. And only Windows Vista drivers are available.. I try one of them, and of course it will not work.
The problem is that i do not have a Vista CD to reinstall vista, so i cannot do that.. Then i saw that Winows 7 was downloadable from microsoft.
I formatted once again, and installed windows 7, because people say that i can just use vista programs and drivers and that they will be fully functional on a windows 7..
So, i go to fujitsus site and get all the drivers for vista.. I install them one by one, and restart after each one..
All the chipboard drivers and so on work totally fine, but when i get to the screen driver and install it, it asks me to restart.
I restart, and then windows wont load. It starts loading and the logo shows up like its loading, and then it just freezes.
I've tried to leave it like that for several hours, and that did not work. I have tried running it in compatibility mode for vista, too, and that did not work either.
The only way i can get back into vista is to use windows restore to set the computer to an  drtime, so that the drivers are removed again. Then it boots fine.
I NEED THOSE DRIVERS TO PLAY! And there is no point in having a computer that cannot play games.

Anyways, when i try to load just the smallest windows games, windows says:
Hardware acceleration is either disabled or not supported by your video card driver, which could slow game performance. Make sure you have the latest video driver installed and that hardware acceleration is turned on.
I cannot install the drivers, so im pretty much stuck. I guess this is why counter strike and the other games cannot load aswell.
When i run the windows utility to "rate my system" i get some okay scores - 4,9 for processor, 5,1 for RAM, 5,3 for hard disk transfer rate, but i only get 1,0, which is the lowest score, for gaming and normal graphics. Again, this makes me think that it is the drivers fault, since before formatting from vista i scored around 5 in both of those. When i ask it for advanced system information, it says:

Total available graphics memory Not detected
  Dedicated graphics memory 0 MB
  Dedicated system memory 0 MB
  Shared system memory 0 MB
  Display adapter driver version 6.1.7100.0
  Primary monitor resolution 1440x900
  DirectX version DirectX 8 or earlier

Again, the drivers is the problem, right?

So, my questions are:
-How can i make vista drivers work perfectly with windows 7?
-Why can windows 7 not boot after installing drivers?
-Is there any way to get my windows vista back? I did not receive any CD's AT ALL when i bought the computer.
-If i find a friend with a Vista Install CD, can i borrow his and put in my reg. number?
-Is the "dedicated graphics memery: 0 MB Really the drivers fault?
-How can i fix this? I would like to keep windows 7 if possible, i just need to find out why windows detects the wrong graphics memory, and how i can fix this so i can play my games again..
-If you need any info, computer specs ect. ask me!

As you can see, i REALLY took a lot of time writing this, and i put a lot of effort into it since im quite desperate.
Therefore, i really do you some of you guys out there will help me with this...
Thanks you :)