When I tried to install a printer on several Windows XP machines, I got this error message constantly.
Cannot install printer. The print processor does not exist.
System reboot doesn’t help and the strange thing is that network printer installation is fine. The printer I tried to install already has a driver on the system. When I tried to install it , it asked me if I want to keep the existing driver and I clicked Yes. The fix is instead of keeping the driver, you choose to copy over the existing drivers.