This is yet another quickie.

SQL Server Management Studio supports plugins, so it is good to have a look if any of them is dodgy:

• HKCU or HKLM\SOFTWARE\Microsoft\Microsoft SQL Server\<version>\Tools\Shell\Addins\<entry>=<addin DLL>

This is a bit of an exotic entry, but it belongs to a very little understood world of Windows Error Reporting.

When applications hang, the Windows Error Reporting framework allows us to attach a debugger, if it is set up in the Registry. The actual key is present in this location:

HKLM\Software\Microsoft\Windows\Windows Error Reporting\Hangs\ Debugger = <executable>