Hi there, I know where you're coming from because like 2 or 3 years ago I didn't know much about computers either.
because of crappy gameplay
The first thing that springs to my mind after reading this is:
1) What games do you play?
2) What resolution (or size of monitor) do you play on?
The thing is that the 6100 is a crappy chipset to game with (sorry for being blunt but it's the truth) and it will remain crappy no matter how much you update the drivers.
My brother has a pc which is much worse. He has a 2Ghz processor like yours but his is a Sempron not an Athlon (ie very much inferior technology). He also had a 6100 nvidia. It's really an integrated chipset, i.e. part of the motherboard and not an independent graphics card per se.
Now depending on which games you want to play, you should consider upgrading your graphics card and get a dedicated card. Dedicated means that it is not a chip in the motherboard but a card which you (or your tech) plugs in himself.
My brother used to play Oblivion on the lowest settings, and with awful framerates on a 17" monitor 1024x768. After I gave him my 8600GTS 256MB he can play it on high with awesome graphics minus some shadows (on 1024x768).
As regards Crysis, he can play it on medium settings with texture and water detail on high, at the same resolution. I doubt Crysis would even load on a 6100 though...
The
8600GTS isn't expensive. Newegg quotes price as $79.99 ($39.99 after $40.00 Mail-In Rebate) -- which honestly I don't know what it means, I never bought from Newegg because they don't ship to Europe.
For slightly more you can get a
9600GT 512MB which is much much better.
You'd be surprised at the difference a little upgrade can make.
However, if you decide to upgrade, before you buy anything download
a small program called CPU-Z because it will tell you the name of your motherboard and whether your graphics slot is pci-e or agp.
That way we can guide you so that you don't buy a graphics card which won't fit.
One of the disadvantages of the 6100 chipset is that since it's integrated it takes up from your system RAM to run the graphics, and this will slow everything down and make gameplay even worse.
[Which brings me to the point pls do check your system specs... it says you got a fantasmagorically-whopping 120GB of RAM...
]