that link goes to a virus/malware site
you must have a trojan in your system and it has downloaded
and installed a browser hijacker.
I suggest you run a scan with malwarebytes .
http://www.malwarebytes.org/
you can get malwarebytes here,
this is a direct download link
so you should have no trouble getting it.
click on this link ? and then select run.
http://www.malwarebytes.org/affiliates/2-spyware/mbam-setup.exe
INSTALL IT TO YOUR DESKTOP, update it,
then run a full scan and remove everything it finds.
some viruses will try to disable it
so if malwarebytes will not start up
then go into the folder it is in and rename the mbam file to XXXX .exe
then double click on the file you just renamed to start it up.
after you have used malwarebytes then do this online scan.
to make sure you have nothing else hiding away.
http://www.bitdefender.com/scan8/ie.html
preferably in safe mode with networking.
if the above fails which i doubt, then try this.
super anti spyware Pro : http://downloads.superantispyware.com/downloads/SUPERAntiSpywarePro.exe
?