I think what your computer has a virus. If you don't want to
spend any money you could run a clean install, but that would wipe
out everything on the computer and you would have to rerun the
start up disk. Or if you spend a good chunk of money, you could get
a professional to open up the command prompt to remove the
virus.
Your computer may have the Ezula virus, that's what my computer
had and it did the same thing.