It seems the recent Outlook update released with security bulletin MS15-115 is causing all manner of problems for end users today.

There isn’t any official acknowledgement from Microsoft as yet but we can expect them to pull the bad patch in due course.

It seems the only answer to this at moment is to uninstall the patch or roll back to an earlier restore system point.

Interestingly enough, this only seems to be effecting users on Windows 7 or Windows 8.1 at the moment, Windows 10 users are safe for now!