The developers are aware of this problem. It usually comes up after the program got synchronized and some data, for example, emails, was downloaded into your computer. The cause of this problem is a corrupted PST file. To fix it, you can perform a scan of your hard disk for errors. To do this, try going to Start, type
cmd in the search bar and press Enter. It is possible that the Administrator password is required. In the command prompt type
chkdsk /f and press Enter. After the ChkDsk is finished, close the command prompt and start your Outlook. If the program is still not fixed, you can visit the following website in order to perform a repair of your Outlook personal folder file.