Vista - System_service_exception

Hello! I built my system about a year and a half ago, and things have been running relatively smoothly, until recently. It has been taking Vista a very long time to boot, and very few boot attempts are even successful. yesterday, I was working with it for nearly 2 hours getting it to boot. Finally, I turned it loose for 30 minutes, and things went fine for the rest of the day (over 12 hours)

Today, I woke up, and went ahead and started booting. It went right through the loading screen (with the bar), where it ALWAYS freezes, and went right to the login. I thought "Too easy..." and i was right. Once I logged in, it shot off a BSOD within seconds. I've been searching for a solution to the problem on my laptop. I've done numerous reboots, booted into safe mode, etc, and nothing has worked yet. I am assuming it is a driver issue, but I do not see what would cause this. None of my hardware has changed. Here are the BSOD Details:
STOP: 0x0000003B
(0x00000000C0000005, 0x0000000000000000, 0xFFFFFA600AE9CEE0, 0x0000000000000000)

System Specs: 4 gigs of RAM (2 - 2gig sticks)
150 GB harddrive
1TB harddrive I just installed along side of it (This was put in after the problems today, so it is not the culprit)
Q6600 CPU
8800 GT nVidia Graphics Card
680i SLI LT Motherboard
Vista 64 bit Ultimate

I noticed in the tiny amount of time before the BSOD, it said something like: The Audio Device is Not Installed. The volume control had the x through it, and hovering over brought this up. (It may have been The Audio Service is Not Running, which is what it said in safe mode. I can not remember which, and I can't get it to get to the Desktop before the crash anymore, unlike earlier, where it gave me about 20 seconds after login before the BSOD)

Thanks for reading! Hopefully someone will be able to help. If you need more details, let me know! Thanks in advance!

If you can get into Safe Mode, uninstall/disable the audio stuff to see if you can get into normal mode that way.

Also, you may want to locate the memory dump file for this error (usually in C:\Windows\Mindump ), zip it up, and upload it with your next post.