Outlook 2013
32-bit Windows	C:\Program Files\Microsoft Office\Office15
64-bit Windows	C:\Program Files (x86)\Microsoft Office\Office15
64-bit Outlook	C:\Program Files\Microsoft Office\Office15
Click-to-Run	C:\Program Files\Microsoft Office 15\root\office15
Outlook 2010
32-bit Windows	C:\Program Files\Microsoft Office\Office14
64-bit Windows	C:\Program Files (x86)\Microsoft Office\Office14
64-bit Outlook	C:\Program Files\Microsoft Office\Office14
Outlook 2007
32-bit Windows	C:\Program Files\Microsoft Office\Office12
64-bit Windows	C:\Program Files (x86)\Microsoft Office\Office12
Outlook 2003
32-bit Windows	C:\Program Files\Common Files\System\MSMAPI\<locale ID>
64-bit Windows	C:\Program Files (x86)\Common Files\System\MSMAPI\<locale ID>
Outlook 2002/XP
C:\Program Files\Common Files\System\MAPI\<locale ID>\scanpst.exe

Outlook 2000
C:\Program Files\Common Files\System\MAPI\<locale ID>\NT\scanpst.exe

Outlook 97 / Outlook 98
C:\Program Files\Common Files\Windows Messaging\scanpst.exe

Notes
Note 1: 
The <locale ID> is a number to identify your language of Office. You can find an overview of the numbers here. You need to look in the “LCID Dec” column for the correct number.

Note 2: 
When you connect to an Exchange server and need to check your local cache (ost-file) for errors you’ll need to run scanost.exe. You can find this in the same location as scanpst.exe except for Outlook 97/98/2000 and Outlook 2010. These versions of Outlook don’t have the scanost.exe feature. In this case, rename the ost-file to .old and Outlook will rebuild a new cache from the Exchange mailbox.

Note 3: 
If scanpst.exe is unable to fix your pst-file, then it is too badly corrupted. You can then try repairing or salvage recoverable items via a 3rd party recovery tool such as DataNumen Outlook Repair (for pst-files) or DataNumen Exchange Recovery (for ost-files). 
If you decide to order use DNC-PUXB-HT to get a discount.