I don't find a Canon MultiPass 600 listed on Canon's web site but if you go
to their support site, you will find tips, troubleshooting, new drivers,
etc.  From here click FAQs and then type Install in the search pane and you
will find an article that gives instructions for uninstalling and
reinstalling your printer driver.

http://consumer.usa.canon.com/ir/controller?act=SupportDetailAct&fcategoryid=238
&modelid=9034

If this doesn't work, then I'd suggest clean booting and then trying the
installation again.  Sometimes you may have items loading at Startup that
cause problems with installations.  These particularly include Antivirus
utilities but others as well so disabling these for the printer installation
may help you get it installed.  You can then re-enable anything that you
disabled to do this.

How to Perform a Clean Boot in Windows Millennium Edition
http://support.microsoft.com/?kbid=267288

PattyL

Since you are concerned that their might be a problem with the driver, I
would first download and attempt to install the most recent driver from
Canon.