quote:
This guide is split into the following 5 steps:
1. We start off by uninstalling any instances of MSN Messenger or Windows Live Messenger. A reboot after uninstallation is optional.
2. Next up, we download the latest version of MSN Messenger 7.5 (which only works for Windows XP and newer) from the Messenger website located at http://messenger.msn.com. Once downloaded, run the installer and finish installing MSN 7.5.
3. Exit MSN Messenger 7.5 if running, now open up Windows Explorer and navigate to C:\Program Files\. Here you need to rename the folder called MSN Messenger to 'MSN Messenger_75'.
4. Now its time to download the latest build of Windows Live Messenger. Once downloaded, run the installer and finish the installation (a reboot may be needed).
5. Finally, you can create shortcuts to 'C:\Program Files\MSN Messenger_75\msnmsgr.exe' (MSN 7.5) and 'C:\Program Files\MSN Messenger\msnmsgr.exe' (WLM) on your desktop (as seen in the screenshot above) so that you can easily start either version at any time.
Once done, you should successfully have both Windows Live Messenger 8.0 and MSN 7.5 installed on your computer. To switch between them, exit whichever one you are already running and start the other. For example, if you are running Live Messenger and want to switch to Messenger 7.5, simply exit Live Messenger 8.0 and then start 7.5.
That's for WLM 8.0 and 7.5, but the same applies for 8.5
Basically.
Install 7.5 => Change Directory Name
Install 8.5
Enjoy
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