so kann man es für outlook freischalten:
Exit Outlook 2002, if running.
Click the Windows Start button, and then click Run.
In the Open box, type regedit, and then click OK.
Check to see if the following key exists. If it does, skip to step 5.
HKEY_CURRENT_USER\Software\Microsoft\Office\10.0\Outlook\Security
If the key path does not exist, create the key path. To create the key path, navigate to and select the key:
HKEY_CURRENT_USER\Software\Microsoft
Click the Edit menu, click New, and then click Key.
Type Office and press ENTER.
Click the Edit menu, click New, and then click Key.
Type 10.0 and press ENTER.
Click the Edit menu, click New, and then click Key.
Type Outlook and press ENTER.
Click the Edit menu, click New, and then click Key.
Type Security and press ENTER.
Click the Edit menu, click New, and then click String Value.
Type the following name for the new value:
Level1Remove
Press ENTER.
Right-click the new string value name, and then click Modify.
Type the extension of the file type that you would like to access with Outlook 2002 as follows:
exe
To specify multiple file types, use the following format:
.exe;.com
When finished, click OK.
Exit the Registry Editor program.
When you start Outlook 2002, the file types specified in the Windows Registry are accessible.