HP1020 printer that will not print

I have an HP1020 printer that flat out will not print. It has worked rock-solid for a number of years. All the desktop printers we have in the school where I work are HP LJ 1012s or 1020s. Around the first of the school year, we had several people who's print spooler would stop after trying to open a pdf document. We were running Adobe 9.1 at the time, and have since upgraded to 9.2 - we thought we had this licked, but it not only happened again on this one computer, I flat cannot get it fixed! Running Windows XP, here's what I've done:

Booted in as Safe mode.
Logged in as local admin and removed files in C:WINDOWSsystem32spooldriversw32x86 and C:WINDOWSsystem32spoolprinters

In the registry, removed the the printer listing in HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlPrintEnvironmentMonitors

After I reboot, and reinstall the printer, still will not print. It might flash a green blinking light like it's going to print, but it won't.

HELP!