How to Fix Slow Microsoft Outlook 2007


When an Outlook 2007 personal folder file (PST) grows very large, the performance of Outlook may be significantly reduced because of the amount of disk activity that occurs. You can take a number of steps to fix slow performance in Outlook, including compressing the PST, configuring Outlook to remove deleted email from the PST and moving old messages to an archive file. Reduce the size of your Outlook 2007 PST to improve the speed of the program.

Removing Deleted Data from Outlook 2007

Press the Windows logo and "R" keys simultaneously to bring up the "Run" dialog box. Type "regedit" without quotation marks and press "Enter." This launches the registry editor.

Use the folder tree on the left side of the window to navigate to "HKEY_CURRENT_USER," "Software," "Microsoft," "Office," "12.0" and "Outlook."


Right-click on the "Outlook" folder and click "New" and "Key." A new folder is created. Name the folder "PST" and click on it.

Right-click in the open area on the right side of the window and click "New" and "DWORD (32-bit) Value." Name the value "PSTNullFreeOnClose."

Double-click "PSTNullFreeOnClose." Change the number shown in "Value data" to "1." Click "OK" and close the registry editor. This configures Outlook 2007 to remove deleted mail from the PST file. The normal behavior is to keep this extra data in the database, even when you have removed it from your "Deleted Items" folder, causing the PST file to continue growing even as you delete messages.

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4 comments:

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Jack Dean said...

Fixing slow Microsoft Outlook is the same as when one is to fix slow computer. One needs to find the root of the problem and the apply the necesarry steps to fix it.