Microsoft Outlook 2007 has interactive user interface with various other advance features. But, usually Outlook 2007 users face the following issues:

MS Outlook freezes during start-up, the status bar shows “Loading Dataset..” for a long time and you cannot perform any action on your email items unless that initial “Send/Receive” is complete.

Since many Outlook 2007 users are complaining about slow processing, it is must to find out a suitable solution for dealing with this issue. Reasons behind the slow performance of Outlook 2007 are still unknown but following are some tips that can help you significantly increase the Outlook speed:

1. Rename or delete Extend.dat, Outcmd.dat, Views.dat, and Frmcache.dat files. You can locate the specified files in Windows XP at following locations:

Extend.dat

C:\Documents and Settings\<username>\Application Data\Microsoft\Outlook

Outcmd.dat

C:\Documents and Settings\<username>\Local Settings\Application Data\Microsoft\Outlook

Views.dat

C:\Documents and Settings\<username>\Application Data\Microsoft\Outlook

Frmcache.dat

C:\Documents and Settings\<username>\Application Data\Microsoft\Outlook

In Windows Vista, you can locate the specified files at following locations:

Extend.dat

C:\Users\<username>\AppData\Local\Microsoft\Outlook

Outcmd.dat

C:\Users\<username>\AppData\Roaming\Microsoft\Outlook

Views.dat

C:\Users\<username>\AppData\Local\Microsoft\Outlook

Frmcache.dat

C:\Users\<username>\AppData\Local\Microsoft\FORMS

After performing the previous action, restart MS Outlook 2007. Your problem will be resolved; but in case, Outlook is still slow then execute the next step.

2. Create a new PST file. If Outlook responses fast with the new PST file then import all of your email items from old PST to new PST and then delete the old PST. But, if the problem still persists then go for next step.
3. Create a new user profile and restart Outlook 2007. This time Outlook performs better than before. Now, you can delete the old profile but if Outlook still responses slow then execute the next step.
4. Disable Outlook Setup add-in on Dell computers that have Media Direct installed. You can disable add-in by following the below given steps:
   a. Select Tools > Trust Center > Addins.
   b. Now, locate the add-in responsible for converting meeting requests to recurring meetings. Moreover, the add-in creates calendar and contact folders while saving attachments.
   c. Select Manage: COM add-ins at the bottom of the Addins window.
   d. Click Go and clear the Cyberlink add-in check-box.
   e. Close the window.

After executing these steps, restart MS Outlook.

5. After executing all of the aforementioned processes if you still face the same issue then uninstall Business contact manager. This will definitely increase Outlook speed by some extent.

While using MS Outlook, you may encounter various JET errors due to PST corruption. PST is an Outlook file in which Outlook stores user’s emails. Once the PST file gets damaged, you need to repair it to access your emails items stored in it. One can repair the damaged PST file by using Kernel for Outlook Repair and email recovery software. The software to repair outlook files can efficiently repair PST files created in MS Outlook 97, 98, 2000, 2002, and 2007.