This fix is for Windows Messenger 4.5 or later versions on a Windows XP Home Edition-based computer or on a Windows XP Professional-based computer.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs.
Note This method prevents programs that use the Messenger APIs from using Windows Messenger. Outlook 2002, Outlook Express 6, and the Remote Assistance feature in Windows XP are examples of programs that use these APIs and that depend on Windows Messenger.
1. Start Registry Editor. To do this, click Start, click Run, type regedit.exe, and then click OK.
If the following registry subkey already exists, go to step 6:
2. Click the following registry subkey:
3. On the Edit menu, point to New, and then click Key. Type Messenger for the name of the new registry key, and then press ENTER.
4. Click the following registry subkey: key:
5. On the Edit menu, point to New, and then click Key. Type Client for the name of the new registry key, and then press ENTER.
6. Click the following registry subkey:
7. On the Edit menu, point to New, and then click DWORD Value. Type PreventRun for the name of the new DWORD value and then press ENTER.
8. Right-click the PreventRun value that you created in step 7, and then click Modify. In theValue data box, type 1, and then click OK.
9. Quit Registry Editor.
You are now finished and messenger will no longer start.
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