This tweak fixes the issue of Hotmail or Outlook being slow after Disabling or Removing Messenger.

This Tweak will prevent Messenger from loading when you access your account via the Hotmail web page, it will also prevent the delay when Messenger has been removed or disabled.


Go to Start --> Run and type regedit
Navigate to the Registry Key below.

HKEY_CLASSES_ROOT/Messenger.MsgrObject.


Right click on the Messenger.MsgrObject key and select rename.
Rename it to Messenger.MsgrObjectold

SOURCE: MAX over at xp-erience.org

As always back up your registry before applying any fixes, or changes!
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I am going to try this now, as I hate having messenger popup everytime I try to check my hotmail!