There are too many things that need fixing from my experience so let's use the tool.
All my printers disappeared from the Printers and Faxes list.
PNP will not recognize either the Brother MFC 8600 or HP 7150.
The "add printer" option returns the message "Operation
could not be completed". The last time this happened I
found that the entire printer list was still in memory and one simple change restored the list but I can not remember it.
I found the print spooler service is stopped.
Entering the command "net start spooler" at the command prompt returned the message "system error 1068 has occurred. The dependence service or group failed to start."
Server properties could not be viewed under
settings/printers and faxes/file/server properties either.
Also the printers key does not appear in the registry