This applies for any Windoze actually. Get all this stuff together and on a flash drive before you ditch your current OS.
First thing: Find out what MOBO you have and what it uses. Chances are its either Nvidia, VIa or Intel. For Nvidia and VIA you need to get the lastest board drivers from (
Here or
Here. If its Intel it doesn't matter.
Whatever board you have the chances are you have a Realtek HD soundcard. If you have a discreet soundcard then go to the manufacturers site and get teh driver. If it is onboard then go
Here.
Final Driver is GFX. You have Nvidia so just grab the latest display driver from the above link.
After that you want to get DirectX. Don't fuck about - just download the redist from
Here.
After all that is downloaded and on a drive, make sure you've backed everything up and go ahead and install Win 7. Delete all partitions and let the util install to the unpartitioned space (its quicker).
Once everything is done and you have a desktop, first thing you do is turn of UAC. Open the Start Bar and left click on your icon in the top left. When the window opens you want to the bottom option in the middle of the screen: Turn User Account Control on or off.
Reboot.
Now install your Mobo drivers (if you aren't using an Intel board). If you have an Nvidia board, when it asks you if you want to install the networking control thingumy, say no. Fucking thing is useless.
Reboot (even if it doesn't ask!)
Now install Direct X.
Reboot (even if it doesn't ask!)
Now install your GFX Driver.
Guess what? Reboot! (even if it doesn't ask!)
Now install your Sound Card driver, whatever flavour it may be.
Reboot (even if it doesn't ask!)
More or less done. That is the basics in the right order. At this point make a System restore point so you can always undo shit when you cock up later
After this I always recommend going back to the MS website and downloading all the C++ redists as a stupid amount of games use them.
They are:
2005
2005 SP1
2008
2008 SP1
2010
You cannot get away with just installing the latest one because, well, MS are idiots.
After that all you need is Chrome and Media Monkey and you are good to go
Yell if you need any more details and good luck.