We knew that Multiple aka Polygamy ID in MSN Messenger aka Windows Live Messenger is like Opening WLM Software Client in many times. Therefore we can use to login in WLM aka MSN with multiple ID aka Multi ID or with more than one username account of MSN WLM. Just like in Yahoo Messenger Multi ID aka Polygamy.
Below is the simple ways to create Polygamy Multi ID of MSN Messenger use Regedit
Polygamy Windows Live Multiple MSN Messenger with Regedit

Use Registry to make Polygamy ID in WLM Messenger is like creating registry that will allow us to open WLM two or three or more in one Desktop Komputer. Just Open the Registry Editor in your Windows by type “regedit” in the Run Command. Start >> Run >> Regedit >> Enter
Choose the Folder in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Live and ont the Messenger Folder right click on it and choose New >> DWORD (32 – bit) Value and name it as MultipleID (or whatever you want, note: if not works name it to MultipleInstances)

After create MultipleID Value now right click on it and choose Modify. Set the Value data to 1 (use Hexadecimal) — See the Picture Above. Done
Now your Windows Live Messenger has patched and capable to use as Polygamy ID aka Multiple ID
Tags: MSN Messenger, Tips and Tricks, Tutorial, Windows Live Messenger
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February 15th, 2009 at 8:43 am
Dude it does not work! my messenger is not multi messenger :((
March 20th, 2009 at 8:28 pm
works fine for windows live messenger 2009
i named the dword MultipleInstances
April 4th, 2009 at 1:20 am
Sorry for the 3rd comment dam typo errors. To the Admin you can delete 2 previous comments if you want to. This does not work. I get as fas as this HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\. Then there no folder called Windows Live. I’m using Windows 7 Build 7068 (64-Bit) and Windows Live Messenger v9.14.0.8064.206.
April 23rd, 2009 at 6:51 am
worked for my 2009, build 14.0.8064.206 when i named the dword MultipleInstances, thanks
June 20th, 2009 at 7:07 pm
how can it works in windows 7 64-bit
July 23rd, 2009 at 12:55 pm
this works…100%..i just tried it…and i can login with 2 ids same time…woww..thts reaally easy
thanks mate.
August 2nd, 2009 at 11:02 pm
Yeh it worked with MultipleInstances as name of new registry variable on WIN VISTA
thanks
September 16th, 2009 at 1:14 am
works great man thnks alot !!!
September 19th, 2009 at 7:03 pm
me too, it only gets to microsoft and i have windows vista windows live 14.0.8… help…:s
September 30th, 2009 at 4:02 pm
Working Nice… :D tks…
October 5th, 2009 at 1:17 am
thnx
October 22nd, 2009 at 7:26 pm
On Windows 7 64bit it lives in Wow6432Node in the registry.
November 8th, 2009 at 10:32 pm
nice
November 22nd, 2009 at 4:29 pm
works fine THANX>>>>
December 1st, 2009 at 7:37 am
its working……..
thanks a lot buddy……….
February 23rd, 2010 at 2:40 am
Thanks man! It worked for me :)
April 23rd, 2010 at 8:21 pm
its not working with Win 7,any help plz
May 7th, 2010 at 1:00 am
Yah man…it works …thankxx ‘
i named file in Registry (MultipleInstances)
Thankx a lot again
July 10th, 2010 at 9:32 am
Thannx.. works fine..
August 13th, 2010 at 7:21 am
it wrkd 4 me ..named it MultipleInstances…
excellent….its awesome :)
September 19th, 2010 at 9:52 pm
I tried above 100 website to download the patch but non of them worked,,,,and now,,it workeedddddddddddddddddddddddddddddd yesssssssssss thank u thank u thank
November 4th, 2010 at 11:47 pm
How about the wlm 2011 !!! it doesn’t work is their another solution ? ? thnx