There is a good possibility that you have some nasty malware or viruses. I will give you links below to programs that will clear out the problems....
At the end of this are three links to programs that you should load up and run. The first is MalwareBytes Ant-Malware Tool, another is Avast Anti-Virus 4.8, the third is Threatfire.
Run MalwareBytes first and perform a quick scan, when it finishes, it will ask you to show the results, click on “Show results, all infections will appear in red.
Delete everything it finds.
Run Avast and install it, when it asks, go ahead and schedule a pre-boot scan of your entire system. This should get rid of most problems….Now,
if you have Norton Anti-Virus, internet security or any of the others, they also be causing some of your problems. They will have to be removed and the only way to properly do that is go to the Norton site and download their Norton removal tool. Run this before installing any other kind of ant-virus. The Avast 4.8 is free to use, just register it once a year, that is all…it will update itself 2-4 times a day to keep its virus definitions constantly updated, you do not have to do anything, it is completely automated and has 7 real time scanners that run all the time.
When your boot time scan is over and you have either deleted or moved the infection to the chest as Avast recommends, now run Threatfire…it will ask you to let it update as will Malwarebytes, do so. Threatfire monitors every web page on the world wide web and lets you know if your tap dancing where you shouldn’t, it will throw a flag up and say abort connection…do so to save yourself from a bad situation. The links are below.