Env ::: PC CLone (Win 2K8 R2), used for Print Server, nothing else, all terminals (C190LEW WYSE), Cloud Servers, 12 HP LJ400 PRO.
Installed iPF605 driver on laptop and tested - good.
Installed Wide Format Canon iPF605 on Print Server. Lost all printers.
Googled and found MS KB 947477 stating that with HP printers attached the server can RANDOMLY crash. Work around was to delete reg key HP TCP/IP Standard Ports (Export first) then change HPtcpMon.dll to .old and restart. I did . All printers came back BUT...
I had installed the iPF605 on my laptop, too, but I didn't lose all my printers until I restarted it.
I can ping all the printers (no duplicate IPs) and others can print to them directly with their terminal sessions (the drivers are on their terms). I have full icons representing the exact printer attached to my laptop and server. Printer properties allow a test page but nothing goes out of the queue.
The Print Spooler is running. Prior to removal of the HPtcpMon.dll, the spooler would start then stop again erroring out on this DLL.
On my laptop, I have uninstalled the iPF605 dirver and the HPLJ400Pro drivers. When reinstalling, the software cannot find the printer even though I can see the web interface GUI if I put in the IP for the printer in my browser. I can also PING the printer.