My yahoo messenger keeps sending malicious links to my friends.what is this and how can i stop this?

ive scanned my pc with anti virus over nd over still the same thing.

My yahoo messenger keeps sending malicious links to my friends.what is this and how can i stop this?live update

there are so many worms that target yahoo messenger at the moment it's quite a mission to work it out and as installed virus scanners are often a target (being disabled) which is perhaps why scans aren't detecting the worm you have acquired so try an online scanner (temporarily disable your currently installed one first though)...

Trend http://housecall.trendmicro.com/housecal...

BitDefender http://www.bitdefender.com/scan8/

F-Secure http://support.f-secure.com/enu/home/ols...

Panda http://www.pandasoftware.com/products/ac...

there are more are listed in http://www.wackyb.co.nz/vb/showthread.ph... if the above aren't suitable :)

follow the steps they recommend for complete removal if automatic repair / quarantine fails

or if any of these look familiar....

W32/Sdbot.worm!4990c306 ~ http://vil.nai.com/vil/content/v_140720....

w32.Kmeth ~ http://www.spywareguide.com/spydet_3149_...

W32/Vanebot-P ~ http://sophos.com/security/analyses/w32v...

W32/Vanebot-R ~ http://www.sophos.com/security/analyses/...

W32/Vanebot-S ~ http://www.sophos.com/security/analyses/...