unexpected browser redirections (you did not initiate or expect) usually have underlying causes the average user is not aware of.
--Obsolete or security vulnerable programs running on your computer.
--Visiting a website that has been hacked, and has malicious files or programs on it installed by the hacker. Even reputable sites have this sort of problem, this is much more common than most would think.
1.) You can see what programs are obsolete or vulnerable to hacker exploits by going here and running this online program here: http://secunia.com/vulnerability_scanning/online/
Unfortunately, Secunia has just finalized their beta version into the final release of PSI, version 3.0, and is still updating their website to reflect this, and links to older versions of PSI cannot be found at the moment. These links should return once the website is updated.
If you like this online scanner, and it helps you remedy some problems with installed programs, you may wish to download a version like PSI 22.214.171.12403 and then upgrade to version 3.0 when you are ready to do so.
2.) Use a web reputation add-on or program in your browser that will give a safety rating for that site. You can get this here: http://www.mywot.com/
I was diverted and downloaded PC Ultra Speed Speed Guard on to my new computer. Is it safe to remove it?
It was very quick to come up with a vast number of errors and I am wary of it!