Today i found emaila ccount sending spam to all of my contacts!just google this post My email is sending spam to all my contacts? ,and it’s not only me have this promble.
do as below:
“Run multiple virus and malware scans (superanti-spyware, malwarebytes, ccleaner,go to http://housecall.trendmicro.com and run a free scan) and THEN change your password when you’re sure the machine you’re on is clean.
If you do have a virus or spyware program on your computer, changing your password before you clean it will just send the new password to whomever hijacked it in the first place.
Also someone mentioned to check your alternate email provided to yahoo. Make sure it is a valid email for yourself. That way, if you change your password, they cannot retrieve it by following the “forgot password” link.
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some free softwares :hijackthis , Malwarebytes ,ccleaner ,combofix