Windows 7: Windows 7 HP Multiple BSOD (Pt 2)

Hi everyone. New to the forum so I'm not sure how it's done, but I'm having a bunch of problems with Windows 7 HP and I need some advice. I upgraded from Vista 64 to Windows 7 64-bit and the same problems still exist. It used to happen once a month but now its happening everyday. It just blue-screened on me when typing this 10 minutes ago, like it knows or something...


I'm getting the most:

IRQL Driver Not Equal Too or Less

and

System Service Exception



Here is my Computers Specs:
-( I built the computer in July 2009 )



Case: Antec 900 Series
Power Supply: Antec Series (900 watt)
Motherboard: Gigabyte UD3R
Processor: Intel Core2 Quad Core (2.40Ghz per core)
Memory: G-Skill 2Gb x 4 sticks, 8Gb total
Graphics: GeForce 9800 GT DDR3
Operating Systems: Windows Vista HP 64 Bit / Windows 7 HP 64 Bit
SATA Hardrives: Primary: W.D. 80Gb, Secondary: W.D. 500Gb, (both 7200+ spin rate)
IDE Hardrives: Tertiary: W.D. 250 Gb, FailSafe: W.D. 40 Gb (both 5400+ spin rate)
Sound: Soundblaster Audigy SE
CD Drive(s): Hp LightScribe DVD 1040 Burner
Monitor: HansSpree 28" Widescreen HDMI LCD 1920 x 1200 Resolution
Keyboard: Razor Lycosa
Mouse: LG-RX720 (2.4 Ghz)


*Files Attached:

I cant open any of those zip files, anyone else

Here try these intead:

Two of the dumps point straight at gfx, i would unistall gfx driver/software and download install latest

Memory could also be an issue here i would download and run memtest86+ to check your ram, recommend min 5 passes or overnight to be sure
Memory Diagnostics

I did try the mem test a while ago, it ran overnight and picked up no faults. Then I was wondering recently, does that mem check only check up to a certain amount of memory? I have 8 gigs of Ram, and was wondering maybe it only checked up to 4. Is it ok to pull out two sticks at a time to check each set of 4 gigs?

And thanks for your help by the way, I really appreciate it. I'll get right on the graphics driver. How do I uninstall a driver? Im used to just updating and overwriting the old dirvers for hardware/software.