[dread]

Well to start off with rundll32 advpack.dll,LaunchINFSection %systemRoot%\INF\msmsgs.inf,BLC.Remove removes windows messenger not msn messenger. http://messenger.jonathankay.com/allsteps.aspx?ID=7
http://www.theeldergeek.com/messenger_removal.htm
Unofficial Windows Messenger Removal - Method II
That page is for windows messenger not msn messenger. Them registry entries is for windows messenger. http://www.msghelp.net/showthread.php?tid=26448&page=2 read what CookieRevised wrote

First of all DO NOT remove, nor disable Windows Messenger to solve these issues. You will cripple more things then you know:

Do not use:

* "RunDll32 advpack.dll,LaunchINFSection %windir%\INF\msmsgs.inf,BLC.Remove"-method
* "HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Me ssenger\Client\PreventRun=1"-method
* "HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Me ssenger\Client\PreventAutoRun=1"-method
* "GPEDIT.MSC"-method
* "renaming msmsgs.exe"-method
* "MessengerDisable.exe > Disable Windows Messenger"-method
as these methods will cripple other parts of the OS; MSN Messenger and some Plus!-plugins will not work 100% anymore (Remote
Assistance, Whiteboard, Application Sharing, Song2Nick-plugin, etc...)

Dont them registry entries look familiar. Look at them other pages do a google search people get msn and windows messenger confused all the time they are different. I am seeing people recommending that page as a guide to remove msn messenger and its only for windows messenger not msn messenger. What version of msn messenger do you have?
They updated msn messenger not long ago to version 7.5.0306, msn messenger 7.5.0306 fixed sever bugs read here http://mess.be/ or here http://www.neowin.net/comments.php?c...tware&id=30729
Changelog

* The "Get a Webcam" link now hides together with your MSN Display Picture.
* The upgrade mechanism through patching will not show a Repair/Remove dialogue first anymore.
* The Chinese version of MSN Messenger now correctly says "Most popular Dynamic Backgrounds" instead of "Data Packets" and "Pixie" instead of "Virtual Dog". In the same version, the Voiceclip error message and tooltip now match.
* The dialing dialogue will now show up when you're on a dialup, disconnected, and trying to sign in.
* The Korean version now supports contact cards.
* MSN Messenger now goes easy on the CPU you left it running on with pending IMs, when you sign in on another machine later.
* An MSN Messenger versus MSN Toolbar bug was fixed.
They have also updated messenger plus if you have that. They updated that yesterday. http://msgplus.net/changelog.php. The only main keys that I know of in the registry for msn messenger is HKEY_CURRENT_USER\Software\Microsoft\MSNMessenger and HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSNMessenger . Delete them at your own risk. I would run windows xp system file checker. I would clear out your temp files with a good cleaner like ccleaner. Run a registry cleaner, which you said you had one TuneUp2006 which is good. There is directories that are left behind when you uninstall msn messenger. C:\Documents and Settings\<Username>\Application Data\Microsoft\MSN Messenger and C:\Program Files\MSN Messenger\ are the directories. The numbers in C:\Documents and Settings\<Username>\Application Data\Microsoft\MSN Messenger is the different passports you use with msn messenger. And it has all of you custom emotes, winks, dynamic display pics, backgrounds etc.. Thats why if you uninstall msn messenger and reinstall it all your custom emotes etc.. is still in messenger. You can delete C:\Documents and Settings\<Username>\Application Data\Microsoft\MSN Messenger if you want but remember you will loose all your custom stuff. If you want to completely remove everything I said, I would uninstall msn messenger. Then restart the computer. C:\Documents and Settings\<Username>\Application Data\Microsoft\MSN Messenger is hidden to be able see that directory open up My Computer then goto Tools then to Folder Options and when that opens up you should see a View tab click on it. Where it says Hidden Files and folders, dot Show hidden files and folders and click apply then ok. Here is pics of it http://www.tacktech.com/display.cfm?ttid=192. Then delete C:\Documents and Settings\<Username>\Application Data\Microsoft\MSN Messenger and delete C:\Program Files\MSN Messenger\. Then I would delete them 2 registry keys. Then I would restart again and run ccleaner or if you have another one run it, I highly recommend ccleaner though. Then I would run windows xp system file checker to be on the safe side. Then I would run a registry cleaner, for a free good one I recommend regseeker . Then I would restart and install msn messenger again. Good luck. To clarify something what I said about that page being for windows messenger and not msn messenger is not directed toward you Duncan. I am just letting you know that page is really for windows messenger and not msn messenger.