You can repair Microsoft Office Outlook database(.pst ) related issues with inbox repair tool (scanpst.exe). This tool comes with Microsoft Office CD-Rom.
Location of this utility may vary depending upon you office installation and Microsoft Office version :
For older versions :
<disk drive>:\Program Files\Common Files\System\Mapi\1033\
<disk drive>:\Program Files\Common Files\System\MSMAPI\1033
For outlook 2007:
<disk drive>:\Program Files\Microsoft Office\Office12
If you are not sure where to find the current .pst file. Check the path from Tools ->Options -> Mail Setup Tab ->Data Files Button.
Now simply run scanpst.exe and select .pst file you want to scan.