64bit Installation Problems - ripping hair out

I am slowly going crazy...

So for about 2 days I've been searching the internet trying to find a solution to my issue. And I haven't been able to find a direct answer, so I'm posting and hoping that one of you beautiful people will be able to help me.

Basically, the situation is this: I currently have Windows 7 32bit installed (no issues installing or running it whatsoever), but I want to try out the 64bit. Do I really need it? Probably not, but I'm now determined to make it work because it's fighting with me.

I've done a clean install (formatted the drive before installing it) about 5 times, since this morning. I'm running an Acer with AMD Athlon 64 X2 4400+ with 280GB hard drive, with 6gigs of RAM, and an ATI Radeon HD 4350. I am installing onto only one partition...none of that fancy stuff.

When telling the computer in BIOS to use the new graphics card, I get a blue screen after Win7 installs, then it restarts to complete the installation, and blue screens. After the BSOD, it restarts again, asks whether I want to start in Safe Mode, then once something is chosen it goes into Loading Windows again, then restarts, and BSOD's again. It's a terrible cycle that never stops (I have tried booting in Safe Mode and others, but they all say that Windows wasn't installed or something). While the BSOD goes away rather quickly, I was able to catch under Technical Information:

** STOP: 0x00000116
** atikmdag.sys

So because I noticed it said ATI in there, I thought maybe I could try installing while telling my computer through BIOS to use the onboard graphics card, instead of my PCIe, then install some x64 drivers when Win starts up. So it installs, restarts to complete installation, and I'm left with a completely white screen with nothing on it. It sounds like the computer is doing something, but I'm not able to see anything.

Why can't the 64bit install as nicely and wonderfully as the 32bit version? Please help, I refuse to give up on this. Thanks in advance for any advice given.

Wow that was a quick reply - thanks! So I have to admit when it comes to the hardware and not easy stuff, I need a little bit of an explanation. Would you mind explaining how I would go about using the onboard VGA adapter please? Thanks

Try removing the new card, install Windows 7. When Windows 7 is working OK, reinstall new card.

^ I actually had the white screen problem about a year ago when I tried to install the 64bit RC version. It installed fine, but went to a white screen after rebooting. I didn't have this graphics card back then, just the one that came with the computer.

Oh thank you...I tried that though and that's when I get the white/blank screen.

I'm assuming your onboard graphics are enabled in the bios?

They weren't, because when I put in my new graphics card it told me to disable it there, so I did. But when I go the BSOD I thought maybe it was the new card causing the problem so reset it to use the onboard graphics instead of the new card.