Why does www.yahoo.com take me to a href="http://m.www.yahoo.com?"http://m.www.yahoo.com?/a

I even went to Internet Options and added www.yahoo.com as my "homepage", so why does it take me to a href="http://m.www.yahoo.com?"http://m.www.yahoo.com?/a When I type in "www.yahoo.com" atop it STILL takes me me a href="http://m.www.yahoo.com"http://m.www.yahoo.com/a (it does not do it at my work computer!). PLEASE HELP. I AM BEGGING. Thanks in anticipations yahooligans :-)