I have an HP printer attached on a network to several pc's. On one of the machines, if you log on as administrator, "Printers and faxes" list the correct printer using corect "dot4_001" port. If I log on as general user this printer/port does not exist.
I tried downloading the driver from hp and "adding printer". This worked all the way to the "finish" button, when it told me the "print processor does not exist". It seems HP dont have an xp compatible driver. The thing is the driver is somewhere on the machine. The printer is not listed under available printers.