|This clearly sounds like you have an active virus and that is probably the cause for most of your problems.|
You should get Malwarebytes download and burn it onto a CD from another clean computer.
Shut down your computer and get into safe mode by clicking f8 again and again until a menu comes up with the safe mode choice. Insert the cd and copy the Malwarebytes to your desktop.
Run the malwarebytes and it should clean up most of your virus or adware problems. Report back here on your results.
Recovery back to the original computer state will clean up the virus but you will lose all your data and programs.