Shared printers

Is the account that you are using have local administrative level permissions?

Yes. I am the Network Admin and I'm using my admin account.

you install or reset dhcp server lately? i would try this. i would walk to a bad printer. if it was connected to a comptuer via lpt or usb i would print a test page to it from that comptuer.if it was on the network with its own nic or a print server and a tcpip connection i would get printer to print me its configuration page to see what ip and subnet mask it is at. i would go back to client computer and go to properties of printer and pick ports then Configure for its port. if it were Standard or Hp tcpip printer port i would check to see if i configured its ip address and subnet mask to match configuration page, if it would work. if not a standard tcpip printer port i would add a new one. what kind of printers? if fixing the ip address fixes it, you will want long term to make those printers static addresses or reserve them address in your dhcp server so they get same ones all the time and this doesn't happen again...

wonder, did you install or reset dhcp server lately? i would try this. if bad printer was connected the network via a computer by lpt or usb, i would print a test page to it from that computer. if it was on the network with its own nic or a print server i would get printer to self-print me its configuration page to see what ip and subnet mask it is at. i would go back to client computer and go to Printer, then properties of bad printer and pick Details tab then Ports then Configure. check to see if its configured to same ip address and subnet mask as on its self-print. or try a New standard tcpip printer port. what kind of printers? if fixing the ip address fixes it, you will want long term to make those configure the printers at static addresses or reserve their address in your dhcp server so they get same ones all the time and this doesn't happen again...

My DHCP is coming from another computer (Windows Server 2003). That computer is fine and has not been restarted.
My printers are all HP LaserJet 1100, 2100, and a 4050. They are not network printers. They are all installed at a local computer and shared from that computer. All are on lpt1 and I can print a test page from all of them. I just can't install on a client computer.

Login as domain administrator on client computer and go to My Network Places-->and find computer where your local printer installed
and right click on shared printer name and click
install option to try install network printer.