I think I dun goofed, Windows will not boot, but hard drive is fine (xpost from r/techsupport)

UPDATE5: Did a SpinRite operation at level 2 on my drive, SpinRite did not complain about anything, so HDD issue is now out of the question for now. Tried booting, same thing. No XP disc on hand, so are there any utilities that may address the issue I'm having?

Will attempt to provide the last CLOSEST minidump before my computer crapped out like this.

Lately, my computer, famous for bluescreening all the time in my residence, is not booting. This started happening after I was entering my Windows password and it froze. I reset it, then Windows shows the bootloader loading (the what-should-be instantaneous sequence before it gives you a graphical anything) and then suddenly restarts.

I have not installed this month's updates per Woody Leonhard's advice, so it's unlikely that an update zapped me. I did have it set to notify but don't download though.

Here's the specs:

• 32-bit Windows XP (SP3)

• 2 GB dual-channel DDR2 RAM

• BIOSTAR Group N61PB-M2S mobo

• AMD Athlon 64 X2 4200+ CPU at 2.21 GHz

• 128MB GeForce 6150SE nForce 430 (integrated graphics)

• 250 GB Seagate HD

I currently have access and am typing from an Ubuntu USB stick with YUMI. I'm still able to see files no problem, and Ubuntu reports the SMART status says the disk is healthy in Disk Utility. If a screenshot is needed, I'll provide one.

I'm figuring something in the MBR might've gone corrupt. Should I just bail out, clone, get Win7 and a new graphics card and get this over with?