If you can't get to it, note Gohip.com has placed a file in your Windows directory that sets your autosignature, changes your search page, and sets your home page. This executable is called winstartup.exe.
To stop this from happening, remove the file from my C:\windows directory and also uncheck it from the Startup tab in MSCONFIG. (In MSCONFIG it may show up as c:\windows\winsta~1.exe)
Note: this is why you should read the fine print before downloading anything