XP Bluescreens after adding printer

I have a client whose systems have suddenly started bluescreening several times a day. The cause seems to trace back to a printer driver issue. The strange thing is that one system hasn't had any new printers added since before the BSOD started while the other started having BSOD just after installing a new printer.

Any advice as to where to go with this one?

Thanks,
Clem