Sopped working after I upgraded to yahoo messenger 10. when I log on it opens then tells me that a problem has occurred and the program (Yahoo Messenger) has to close

if your yahoo messenger is unable to connect, it all depends on firewall that blocks messenger connectivity. Try this open yahoo messenger> click on messenger> click on connection preferences> select no proxies> click OK. Now try login in. Cheers,please comment on this post by telling how helpful it is

To improve the performance of your yahoo messenger, the best suggestion is to upgrade first your windows Internet Explorer. version 8 is highly recommended. This will stable the connection of your yahoo messenger to the internet because Yahoo products like yahoo messenger and yahoo mail all rely its connection from Internet Explorer.

It doesn't matter if you are using other net browsers like mozilla firefox or google chrome. Just upgrade to IE8.0 and you will see the difference.

See this helpful tip, http://www.fixya.com/support/r5025589-easiest_way_solve_yahoo_messenger it might help you.

Please do rate.
Thanks for using Fixya.

If you wanted to sign in with your Yahoo Messenger in just a second you will need to improve its connection.

The easiest way for you to establish a good connection is to upgrade your Windows Internet Explorer. In case you didn't know Yahoo Messenger rely its connection from Internet Explorer.

The best suggestion to improve the connection of your Yahoo Messenger is to upgrade the Internet Explorer of your computer. Compatible to the system software you are currently using. (Example if your operating system is windows vista, Install Internet Explorer 8 for Windows Vista)
After you upgrade your Internet Explorer, uninstall the yahoo messenger on your computer and then reinstall again. After doing this, restart your computer and try to log in. You will surely see the difference.

These are the link files that you will need to upgrade.
Click it to save.
1. Internet Explorer8 (winXP, winXP-64, winVista, winVista-64) - select your operating system and download IE8
2. Yahoo Messenger 10 - download and install this after you remove previous version of yahoo messenger on your computer

(Note: if you are using different web browser, It doesn't matter. Install Internet Explorer 8 and just don't default it as your web browser)

There is also a helpful tip on how to solve Yahoo Messenger Trouble Connecting issues.
Visit this link http://www.fixya.com/support/r5025589-easiest_way_solve_yahoo_messenger

Try this one. you will surely like the outcome.

Please comeback and give me some ratings if your connection is establish.

Thank You for using Fixya.

so try to uninstall yahoo messanger, and check for any virus instaled. and reinstall messanger,and test

Hi! This error code relates mainly due to your action due to upgrade / re-install / repair of windows XP and to avoid this reinstall XP SP1a [service pack 1a] and immediately restart the system. have fine in all applications

Log in problems
here are some suggestions you should check/try if you haven't already.

1. The date on your computer needs to be set properly -- double click the clock verify that
the time and date are set.
2. If your password information is not saved, verify that you are typing it in with the
correct case (uppercase or lowercase).
3. Change your password to something smaller (under 10-12 characters), then try signing in again.
4. If you use a firewall (like ZoneAlarm, Norton Internet Security,WindowsFirewall etc. ), it's possible
that Messenger doesn't have the correct rights to access the Internet, especially since you
upgraded. You may need to re/add Messenger to the allowed list of programs in your firewall
if this is the case.
5. If you disabled your firewall in the past, it still may be blocking Messenger -- try
restarting it and see if that helps the situation. You also might try uninstalling an
installed firewall, to verify that it isn't causing a problem (even if it is disabled).
6. Clear your IE cache and cookies -- open Internet Explorer, click the Tools menu, then
Internet Options, then click the Delete Files button, and when that's complete click the
Delete Cookies button.
7. Check your IE Security settings -- open Internet Explorer, click the Tools menu, then
Internet Options, then Advanced tab, scroll to the Security section, and verify that "Check
for server certificate revocation" is unchecked. Also verify that 'Use SSL 2.0' and Use SSL
3.0' is checked, then click OK.
I recommend using 8.1
http://download.yahoo.com/dl/msgr8/us/ym...

You need to remove version 9,or present version, 1st to get another version to work. To remove Messenger version Use Unwise located middle of page of Messenger Folder.Make sure Automatic is checked! then continue to uninstall..Or use control panel ,Vista-program features or XP-add/remove this is the 2nd best way. If you just delete the Yahoo file to remove messenger,you will also lose the shared file that contains things needed on other Yahoo sites. Your contacts are stored online But if you want to save your old messages archives,they are saved on your PC in the messenger file you are about to delete.Go here and copy them to a new folder
Start>my computer>c:drive>program files>yahoo>messenger>profiles>(your ID)>archive>messages

To get away from errors you need to use YM8.1
Messenger "9" 1st version was in Beta (testing) form. The newest version is not, But it's not working well either. Stick to 8.1 until they work out the Bugs. Including people using 8.1 trying to message ones with 9 or reverse they are having compatibility problems; like text not showing,pictures not showing. It shuts down on Vista users , not allowing people to log in.Web cams do not always work. Many things do not work or are missing that YM 8.1 has. It Seems for Vista users it is so buggy Yahoo is giving up on it and are no longer trying to fix it. http://www.ymessengerblog.com/blog/2008/...
Download 8.1 here;
Yahoo 8.1: http://www.soft32.com/download_30.html.....
Use this method: Start,My PC, C drive, open Program files.Next open Yahoo file then Messenger file.Click on UNWISE to Un install messenger 9 completely. Do not just delete yahoo file as this can cause problems with other Yahoo programs.
Your contacts list and messages are stored online and will be there when you return to 8.1 messenger.
Another big problem is with the latest update for Flash Player
Flash player 10 Does have conflicts,and 9's latest update 9.0.124.0 Can have conflicts with Yahoo(very rarely, if you are using it with no problems keep it) and is causing some Yahoo Messenger services to not load.Use the link below for a download of Flash player #9.0.115.0 It should work as it's the latest before 9.0.124.0 . You have to remove the present flash player,add/remove programs in control panel, then download the older version.
http://www.soft32.com/download_500.html....
More help can be found here; http://www.freecreed.com/userid.html...
3 weeks ago 
Source(s):
Soft 32 is showing "errors" on the link. updated links;
Download 8.1 here http://www.filehippo.com/download_yahoo_...
http://www.adobe.com/support/flashplayer...

you might have installed third-party plug-ins, audibles or emoticons on your yahoo messenger. these programs are automatically loaded everytime yahoo messenger starts. they work fine, not until you reinstall yahoo messenger or upgrade it to a newer version causing an internal error when they are loaded. first, remove/uninstall all these programs from the add/remove programs in the control panel, be very careful when doing so and be very sure of what you are removing. then uninstall yahoo messenger. if error still occurs during the uninstallation process, you haven't removed every program/emoticons/plugins connected to your yahoo messenger. when uninstallation is successful, restart your computer and then delete the yahoo messenger folder in the programs folder on your system hard drive. then you can reinstall yahoo messenger before adding/installing your emoticons or plug ins again.

I cant uninstall yahoo because it says cant find install.log file I think I deleted it by mistake so what do I do?