MS Office 2007 Outlook "Not Responding" while opening mails with attachment

If you find that Outlook 2007 not responding while try to open mail with attachment but no issue opening mails without attachment. Also in some case Outlook shows not responding message suddenly it close and reopen Outlook.

First you have to check the Outlook storage file size, if it is exceeded 5. GB, Make a backup of your .PST file and Compact it. In Select Menu Tools- Account Settings. Select Data Files tab from Account Settings window. Select your Outlook Default store and click Settings-Compact Now Button. It will start Compacting. It will take a while depending on your .PST file size and in it will ask about Archiving your old mails. It is best to allow Outlook to achieve. After compacting, try to open your mails.

If you still found an issue, go the installation folder of Outlook, that is C:\Program Files\Microsoft Office\Office12 and look for SCANPST.EXE. Run this file as Administrator and Browse for your Outlook .PST file. This application scans your .PST file for any error. This process takes a while because it had 8 phases to complete. If it is found any error, it will ask to repair the file with a backup file. After repair check your mails.