this is buenchico's answer to someone else who was having the same prob"If you'd actually like a solution to your problem after all of the random stuff above, download and install the free version of Malwarebyte's Anti-Malware:
http://www.malwarebytes.org/products/malwarebytes_free/
(NB: When installing it, ensure that you de-select the ticked box offering you a trial of the 'PRO' version).
Run a scan with that program and get rid of anything suspicious which appears. That should fix the problem but, if not, reboot your computer into Safe Mode (by pressing F8 during the boot-up process) and run the scan again.
Then remember to post questions about computers in 'Technology', rather than in Chatterbank, so that they get seen quicker by people who might actually be able to answer them!"