printer problem on windows xp pro

I hope someone can help me…
The thing is that one day an error prompted a couple of times about not reading memory (always when I was shutting down my computer) and I can not print since then. Before that I had no problem!
My computer can not find the printer (HP laserjet 4P, I know it’s too old) so I installed the new drivers.
Then I thought about the port, but it works fine.
I can send any page to the printer, the spooler processes it and a printing error appears and it stops there.
Any idea?
Thanx!!!