Printing lockups

I take care of a subnet of a very large NT network with Win95 clients. We have serveral HP 4000 printers that run well at this location. But out of the 30+ computers, about 4 will lock-up when printing from verious applications. I have deleted and re-installed the print drivers and re-imaged the hard drive which causes the problem to go away for a while.

Right now the only “fix” is to have the use reboot but doing this sometimes 4-5 times a day is not nice.

All the other users do not have the problems and most users have the same model of PC. The network is tcp/ip with a local BDC which also is the print server. Any ideas?