If you see a bunch of these:
SpoolerWin32SPL, Event ID 4
“The print spooler failed to reopen an existing printer connection because it could not read the configuration information from the registry key S-1-5-18\Printers\Connections. The print spooler could not open the registry key. This can occur if the registry key is corrupt or missing, or if the registry recently became unavailable.”
look for S-1-5-18\Printers\Connections in the registry. It probably goes down as far as “Printers”, but “Connections” is probably absent. Create it as an empty key, and the messages will stop.