printer hp5150 stop working after a wile

os windows 2000 profetional:programs microsoft excel,vip,outlook express: printer hp5150 stop working after a while.I have restarted windows stil nothing reinstalled driver restarted windows work for a couple of houers than exacctly the same problem. downloaded a nother driver from the web stil the same problem I have olso swaped the printer with another the same model hp5051 stil same problem. most of the times it will continue printing. please any sugestions!!!!!!!