I have this error prior to entire system shutdown...
A potential problem has been detected and Windows has been shutdown buggy application to prevent damage to your computer.****WXYZ.SYS - Address F73120AE base at C00000, DateStamp 366072A3 Kernel Debugger Using: Com2 (Port 0x 28f, Baud Rate 192000)

Is this the place to ask for help?

Sounds like your PC is infected with malware.

The best thing to do is to follow this http://wiki.castlecops.com/MRP

If you think you're still infected with malware post a Hijackthis log in this forum.

/f67-Hijackthis_Spyware_Viruses_Worms_Trojans_Oh_My.html

I also suggest you install Windows Defender (if you use Windows XP), which is free and is available from http://www.microsoft.com/athome/security/spyware/software/default.mspx