Verified answer

Try uninstalling Yahoo Messenger then downloading it again. You won't lose any of your contacts, I assure you:

Click on: Start

Click on: Control Panel

Click on: Add/Remove Programs

Click on: Yahoo Messenger then remove

Download Messenger from one of the following links:

For Mac:

http://messenger.yahoo.com/mac.php

For Windows Vista:

http://messenger.yahoo.com/download.php

The new version of Yahoo Messenger just released (9.0 Beta):

http://beta.messenger.yahoo.com/

You may have too many programs running in the background draining your system's resources. Tuneup Utilities 2007 is an excellent program which has a Start-up Manager Tool which you can use to disable unnecessary programs from automatically starting up when you boot or restart your computer: http://www.download.com/3000-2094_4-10698444.html

I even have this situation. i'm exceedingly optimistic that is simply by love somebody suggested, a trojan horse thats going around that abuses the status message of persons. I observed a vietnamese?-form status message that has a URL which is going around that once you click, you get the contaminated besides then u additionally get a similar unusual status message.

It's a virus that you got, that virus will appear a link which lead to a virus site if someone on your list click on it. Get a anti virus and scna your computer. I know this cause a lot of my friends got it and i once got it too.

after u login ur yahoo messenger keep ur cursor on the person u want to hide from right click on his name u vl get a menu there u can see stealth setting option on that u click and u can set ur setting whether to keep online or offline