If your browser is redirecting you, this indicates the presence of a HOSTS file, as often as not.
If there is a HOSTS file, rename it to anything else. Or delete it.
If you don't know why there is a HOSTS file on your PC, then there should NOT be one. Delete it.
I use one to block the worst sources of spam ads.
A HOSTS file is used to redirect your browser so that, for example, you can block specific ad or porno sites from being accessed.
They can also be used to block access to sites that host virus and worm recovery tools and anti-virus software.
On Windows 7 or XP, the HOSTS file will be located here:
Open HOSTS (no file extension) using Notepad.
If the file exists, delete or rename it.