If I were you , after everything is backed up I would run a virus check , and then get Malwarebytes , superantispyware free edition , ad-aware , and spybot search and destroy , and scan with all of them . My son had a problem with that and he didn't have antivirus program , he said he just checks it every week . I know nuts ... especially all the file sharing he does . Anyway , it took me about all day playing with those 4 programs but I eventually got it cleaned out . Before all that I first installed antivirus and ran a virus scan but all 4 programs found something . That was just about a year ago and he hasn't had a problem yet . He had about 200 different things that the 4 different scans found .
With the superantispyware when you double click it to open it don't do anything after that , it takes it about a minute to open , then when it does and you click to update it won't do anything for about another minute or so then it will begin to update . When it gets all done you'll get a screen with everything it downloaded and probably an offer to buy .
Maybe I should have asked if you did all this already . It may just be you've got a pesky something or other on there causing trouble.