Run some bug scans. MALWAREBYTES will tell you if you've picked up some unwanted programs. Then follow up with SUPER ANTISPYWARE which detects some more bad startup apps. Finally I run SPYBOT SEARCH & DESTROY which has an immunize feature that I like. Then update and run your anti-virus if you have one. When done repost something specific. There is no way to diagnose anything from what you've posted here.