This Blog is written in two languages. / Ce blog est en deux langues.
==========English==========
I’ve been getting the 80072745 error in Windows Live Messenger the last 4 days.
I contacted Microsoft but there was no answer from their side. I googled a lot but no solution on the net seemed to work with my problem.
I’ve tried Live messenger 8.0, Live Messenger 8.5 and also the beta version (9.0) but all the time, the same error showed up.
I tried to remove the messenger and reinstall it but no luck! I removed even the registry keys messenger uses and installed it again, but nothing changed.
The troubleshooting wizard reported that everything was fine and the connection was OK!
I installed Windows Messenger 5.1 for XP and tried to login, and that WORKED!! so I found out that there’s no problem with my account, my IP, my ports or microsoft services’ servers!
After some tests, I got to the point that the problem is that I can’t send data to the messenger servers. I had OUTPOST FIREWALL PRO 2008 installed on my computer. I configured the firewall to trust Live Messenger and allow TCP and UDP communications for the messenger, but the problem was still there. I uninstalled Outpost Firewall and restarted the computer, but still no luck!
Today, I thought again about what might cause the problem… and I got to the point that my antivirus software might be blocking some of the messenger’s activity.
I had ESET NOD32 PRO Antivirus installed on my system. By uninstalling the antivirus and restarting the system, Windows Live Messenger could connect again!! And I’m back on the network!
Well, please keep in mind that IT IS ESSENTIAL to have an Antivirus and very recommended to have a Firewall, but sometimes incompatibility issues might show up.
Now I’ll be using McAfee VirusScan Enterprise 8.5 and McAfee Personal Desktop Firewall, because with these two, I had no compatibility issues yet!
So the 80072745 error: “We were unable to sign you in to the MSN Messenger, possibly because of a problem with your Internet connection. Please try again later. 80072745″ in Live Messenger is solved!
But remember that each situation should be studied well before trying anything. So, don’t rush into uninstalling your antivirus or firewall, first, try other alternatives listed here:
and here:
http://www.stupidprogrammer.com/PermaLink,guid,f9cb4612-581d-41b1-8c3c-a3f0a23b1ef3.aspx
And Feel free to contact me if you have any issues on this topic. The best and fastest way would be to let comments here and to subscribe to the RSS feeds to be able to follow up the discussion(s).
=======Français=======
L’assistant de dépannage a indiqué que tout allait bien et la connexion est OK!
J’ai installé Windows Messenger 5,1 pour XP et a essayé de me connecter, et ca MARCHE!
Eh bien, s’il vous plaît gardez à l’esprit que, IL EST INDISPENSABLE d’avoir un antivirus et très recommandé d’avoir un pare-feu, mais parfois des incompatibilités pourraient apparaître.
Maintenant, j’installe ”McAfee VirusScan Enterprise 8.5″ et “McAfee Personal Desktop Firewall”, car avec ces deux, j’ai pas de problème de compatibilité pour l’instant!
Donc, l’erreur 80072745 : “Nous n’avons pas pu vous connecter à MSN Messenger, peut-être à cause d’un problème avec votre connexion Internet. S’il vous plaît réessayer ultérieurement. 80072745″ dans Live Messenger est résolu!
Mais rappelez-vous que chaque situation doit être étudiée bien avant de tenter quoi que ce soit. Donc, ne vous précipitez pas de désinstaller votre antivirus ou pare-feu, d’abord, essayez d’autres solutions énumérées ici:
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12,998 views | Jan 5th, 2008
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January 8th, 2008 at 10:03 am
Hi,
I had same problem too. I tried lots of things to fix that but I couldn’t fix untill I read your post. I uninstalled Nod32 and it worked, thank you for your share;)
Burak
January 10th, 2008 at 3:36 pm
Hi
I have the exact same problem that you describe. After installing the latest version of nod32 (eset antivirus is been called now) and after rebooting MSN didn’t work anymore giving me the well know error code 80072745 :S
after a lot of forums reading and try all recommended solutions, nothing works!! (only using the 5.1 version works, just like you)
After a lot of frustration I start thinking in some change made lately in my PC and the only one was the antivirus update (from 2.X to 3.X)… so I un-install my antivirus.. try to log to MSN and works marvelous as before… so It was the new NOD32!!! I was very surprised ..considering that I disable it the service (on one of my tries) and that didn’t work.
so the conclusion was that the only solution was REMOVING nod32… and I don’t like that! I prefer nod32 before any other antivirus, I have a lot of bad experience with McAffe so I’m thinking on installing it. May be I could try kapersky.
Does any one has any explanation on this matter?
Regards
January 29th, 2008 at 10:26 pm
hello….i have the same problem as you have…but ive always known that the problem was with the antivirus program….i had eset but that had no problems with msn….before i was using norton internet security it didnt allow me to connect to msn…now im using bit defender 2008 total security and it doesnt allow me to connect to messenger even though i set the firewall settings as it should be….but when i connect through a wired lan not wireless i can connect…if u have a bug fixer or anything or even know what to do i’d be very grateful…thanks a lot…
March 26th, 2008 at 11:51 am
[...] http://gibni.com/live-messenger-cannot-sign-in-80072745-error-in-live-messenger-solved [...]
April 14th, 2008 at 8:05 am
Hi!
I have same problem with Eset programs. With NOD32 3.x I find a solution (I try only once, and it have worked - it doesn’t mean, that will work anytime): At the Task Manager (Ctrl+Alt+Delete) close the ekrn.exe program (it will restarting immediatly automaticly, so, it isn’t disappear from the task list). And try to log in with Live Messenger.
I have tried with ESET Smart Security (ofcourse with opened MSN ports), but didn’t work…
May 8th, 2008 at 10:42 pm
hi
I had the same problem
I was searching in web and when i found this post I tried to uninstall the nod32 and it worked.
About antivirus, well I heard about AVG and I’ll try it. is free and I heard good things about it.
Good luck u all
May 15th, 2008 at 1:35 am
merci à toi pour lapic
May 28th, 2008 at 12:34 pm
hello, j’aime beauicoup ton blog
on y trouve souvent quelquew perles. Je me demandais pourquoi avoir fait cete précision :b “i contacted microsoft but there was no answer from their side” 
June 1st, 2008 at 2:21 pm
Here is the crazy thing I had to do to fix this…
Dear all if you have not heard simply add these addresses to the following file that should be opened with notepad and MSN will work.
C:\WINDOWS\system32\drivers\etc\hosts - (When you open the ETC folder open the HOSTS file using notepad).
insert the following addresses:
65.54.239.80 messenger.hotmail.com
65.54.239.80 dp.msnmessenger.skadns.net
(INSERT THEM DIRECTLY UNDER THE OTHER 2 ADDRESSES AND ALIGN THEM WITH TAB.)
Easy done … good luck.
June 5th, 2008 at 12:04 am
I had problems but its only with ym new @live.co.uk addy
the others works
June 5th, 2008 at 10:40 am
Hi,
Thank you everyone for your warm and constructive comments!
Keep commenting
June 9th, 2008 at 4:07 pm
Hola Chicos,
Les cuento que tenía el mismo problema. Instalé el nod32 y el messenger dejo de funcionar. Después de navegar en la web por buen rato y no encontrar respuesta me puse a jugar con el nod32 y encontre que si vas a propiedades avanzadas\configuración de la protección del trafico de red\navegadores de internet y deseleccionas el messenger. Luego dentro de esa misma ruta vas a MOdo activo y tambien deseleccionas el messnger entonces LISTO!!! ya tienes messenger again!!! yeeee!!!
Si no te funciona trata deseleccionando también el iexplorer y prueba. Muchas suerte.
Sorry if I didn’t write in english. I love spanish! bye!
June 14th, 2008 at 4:47 am
Duda Kata, Mil gracias por la info del Nod 32.. Hice lo que propones y MAGNIFICO MSN Nuevamente me funciona!!!
August 28th, 2008 at 4:58 am
Yup, you are right, it’s Eset NOD32 anti-virus that caused the problem. Once I uninstalled NOD32, rebooted the PC, Live Messenger MSN worked fine. I guess I will have to change to another anti-virus. I installed the Free AVG anti-virus for the time being which worked fine with Live Messenger MSN.
August 28th, 2008 at 5:49 pm
i had the same prblem n i also use nod32…the solution is tht disable ur antivirus and make sure tht live messenger is ticked in ur firewall settings n also make sure ur time and date is correct…den try to sign in n it will work…after signing in…enable nod32 again….:P
October 21st, 2008 at 12:45 pm
The-fix: Right click on the Nod32 icon in the systray where the system clock is, click on Advanced setup. Select Protocol Filterting and change the selection to HTTP and POP3 ports. This will solve the problem. (You’ll need to close and reopen Live Messenger after you’ve made the changes before it’ll work)
October 29th, 2008 at 7:49 am
I have the same problem when using NOD32 and I tried “the fix” that Nico mentioned. It works! Thanks alot.
November 2nd, 2008 at 7:02 pm
I had the same pb. Thanks to Nico for his solution.
I unchecked the two boxes (POP3 and HTTP) in Advanced Setup.
Whatever, Is the web protection still efficient after this?
November 4th, 2008 at 2:59 pm
perfect Nico! THXXXXXXXX!!!
November 5th, 2008 at 11:46 am
In Nod32
Go to advanced Setup
->Antivirus and Antispyware
->Web Access Protection
->Http
->Web Browsers
UNcheck Windows Live Messenger.
Job Done.
No host file messing.
November 5th, 2008 at 6:21 pm
falew Nico Says
é so abrir o nod32 , clik em cong avanças e selecione Protocolo Filterting e altere a selação pra Http e pop3 portas.
iiii pronto problema solucionado !!!!!
naum abra mao d ter nod 32 (considerado uns dos melhores do antivirus do mundo se naum o melhor)
November 8th, 2008 at 8:41 pm
Hi Guys,
having the same problem, dont have Nod32 only windows firewall and windows Live OneCare, turned them both off and still getting the error message!
Any ideas on how to fix this??
November 13th, 2008 at 11:07 am
Thank you very much. 55
???????? ???? ^^
November 25th, 2008 at 1:42 pm
Thanks Dallan!
November 25th, 2008 at 8:42 pm
thanx nico
December 17th, 2008 at 8:26 pm
o meu eu estava mexendo no menssager do nda caiu a net ai a net volto e o msn nao pqe issu ?
December 18th, 2008 at 12:12 am
@bruno: I didn’t understand your msn issue, could you please explain in English?
December 18th, 2008 at 12:16 am
hi, my msn wont let me sign in it says there is an error with the code 80072745 … i use avira antivirus and i seriously dont know what to do… so could soe please help me and email me at Andy.gauld@hotmail.com
I REALLY NEED TO GET BACK ON MSN
December 18th, 2008 at 12:24 am
@Andy: Please read this article and all its comments, it might help you. for example I suggest you try this, and also do some research on possible issues between your antivirus (and firewall, if any) and MSN connectivity. On the other hand, check your MSN account for the country you have set in your profile.
and also try to uninstall live messenger (then restart your computer)and reinstall Live Messenger again.
You may also try to clear the cache and delete cookies of your default web browser.
December 28th, 2008 at 3:49 am
thnx for tthhe comment yarrrr.,,,,,it was really the nod f*****g sh**
December 29th, 2008 at 4:47 am
Dallan??????????Nico??????NOD32 ESS 3.0.672.0?????????????well done!
January 7th, 2009 at 1:29 pm
Dallan provided an easy and straithforward solution