I'd check in your hosts file to see if the site you use to access your yahoo mail is re-directing you to a different site.
The hosts file is located at c:\windows\system32\drivers\etc
Open it up with notepad. As a default the only thing that should be in there is a bunch of lines commented out with a # sign and the loopback address (localhost 127.0.0.1)
Sypbot will add entries to this files, but comments them into an area designated as spybot's.
Look in that file for anything associated with yahoo. If there is, delete them, then try logging into your e-mail. When you're there, be sure to change your e-mail password.
Its a frigging Laptop, not a Labtop!!!!