When you open any Attachment in Outlook – Outlook opens it in a Temporary Folder which is located at:
C:\Documents and Settings\%user%\Local Settings\Temporary Internet Files\OLKXX
This folder name usually always starts with OLK but can have any two random numbers after it.
And remember, %user% is the name of the user who is logged in or having the problem.
Normally, the contents of this folder are emptied when you close Outlook. But, when that does not happen, that is when you start having problems.
To fix this problem, you will need to do the following:
1. Identify the correct Temporary Outlook Folder
2. Delete the contents of that folder or Delete that folder itself
3. Restart Outlook.
HOW TO IDENTIFY THE CORRECT OUTLOOK TEMPORARY FOLDER:
You can find out the location of the Temporary Outlook folder from the following registry entries:
Outlook 2000: HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Outlook\Security
Outlook 2002/XP: KEY_CURRENT_USER\Software\Microsoft\Office\10.0\Outlook\Security
Outlook 2003: HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\Security
Outlook 2007: HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Security
When you double-click on the respective OutlookSecureTempFolder registry key, you will be able to see the location of the Outlook Temporary folder.
Copy that location. Open Windows Explorer and paste it in the address bar to get to that folder and empty it.
It’s OK even if you delete the entire folder – because Outlook will create another one anyways when you restart it and your issue should also have been resolved.
ALTERNATE SOLUTION: If you don’t feel too comfortable about deleting the Outlook Temporary Folder or its contents or if you cannot find it, you can just Click on the Value Data field corresponding to the respective OutlookSecureTempFolder registry key and type in a new folder path there, like for example C:\temp0. Exit the registry now and make sure you actually create the folder at the location you put in the registry, that is:- C:\temp0.
Did you know? You can also use this solution when you are not able to view Pictures embedded in Outlook!
You can Restart Outlook now and you will not have that problem anymore.