Try reinstalling your drivers and Windows.
Some viruses do so and even when the virus is removed you can't get rid of these.
So just do what i said.
I answered this here because i couldn't find any suitable forum.
بن بست معنا ندارد یا راهی خواهیم یافت یا راهی خواهیم ساخت Pleasure can be silence , After a deafening din