I've been disinfecting a Win XP laptop from viruses and scareware. I used a UBCD4Win disc and the Superantispyware, Avira plugins, etc. When I had enough control over the desktop I upgraded IE to 8 and downloaded Malwarebytes, Superantispyware, and Avira.
I was finally getting clean scans and most symptoms were gone. THere were one or two browser redirects still active. As part of basic protocol I upgraded the computer to Service Pack 3 and that's when things started to go wacky.
After the restart and the Service Pack splash screen the computer started the regular splash screen with the moving blue bar and hung there (with the blue bar s-l-o-w-l-y creeping across the screen). I powered down the laptop and restarted; it hung again. I restarted the computer and went to safe mode.
It pauses after loading Mup.sys, a couple of seconds later it says "Press Esc to cancel loading d347bus.sys", which if you do so you get a blank, blue screen with a minimize and question icon in the upper left corner, and if you just let it load you come to a blue screen. A 0x0000007E STOP error.
I'm including pictures of the relevant screens.
What's my next step to try and fix this?