

In such situations, its best to let Outlook complete its task At such times, Outlook may respond slowly. At time, your Outlook may be busy carrying out some other processes, like synchronizing your mail, archiving old items, etc.Take a look at your installed Outlook add-ins and disable them selectively, in order to find the offender. If Outlook does not give you any problems, it is possible that one of its add-ins is creating problems.

To do this, open Run box from the WinX Menu, type outlook /safe and hit Enter. Run Microsoft outlook in Safe Mode: without add-ins.
