This is quite common, especially on large PST files. If the options below don’t work then the problem is with your PST file, so the easiest thing to do is to find the PST file and rename it. Outlook may or may not start, if it doesn’t rename the next PST file in your profile. Best to try other options first of course:-
Outlook hangs because its data files are being accessed by other applications
When Outlook starts, it needs to access and lock its data files (PST or OST files) in order to read & write to them. If your data files are already being accessed (or locked) by other applications, Outlook will hang on “Loading profile…” while waiting for the data files to become available.
Such situations can occur if:
- Third party applications are syncing with Outlook at that moment (for example Google Calendar, Microsoft Communicator etc). Solution: identify the installed applications that might require synchronizing with Outlook and stop these applications from their sync process or wait for them to finish;
- Your anti-virus is scanning your data files. Solution: disable your anti-virus and see if the problem is solved;
Your Windows search engine is currently reading / indexing your data files. Solution: stop the indexing service and see if Outlook loads fine;
- There is an earlier Outlook process / session that still runs in background, locking your data files. Solution: start the Windows Task Manager and kill (end process) the outlook.exe processes that are running, then try again to start Outlook.