Windows 7 Print Spooler stops every 2 minutes

I have a client who has an issue whereby her Print Spooler on her Windows 7 PC stops after 2 minutes. I have set the service to restart on all subsequent failures, but it still drops out after 2 minutes, restarts after 1 minute, then crashes again after a further 2 minutes. Rinse and repeat.

I have updated all printer drivers, and run Windows update.

I have scanned for viruses

I have run SFC which came up clean.

I have tried deleting all the files from within %windir%\windows\system32\spool\printers

I have deleted all extra providers from within HKEY_LOCAL_MACHINE\SYSTEM\CURRENTCONTROLSET\CONTROL\PRINT\

I have taken ownership of spoolsv.exe

In Turn windows features on or off I have tried unticking Internet Printing Client, ticking LPD Print Service and ticking LPR Port Monitor

This issue has persisted through multiple restarts over the course of a week. I'm hesitant about using a registry cleaner but if it comes down to it, I could potentially be persuaded if nothing else works.