Cursor jumps and then runs away with text

Hi Techs,

This problem first occurred yesterday when I C&P'd some text from Wikipedia and started to edit it on a youtube comment. It has infected all typographical operations; email, wordpress blog and editpad.

I type one full paragraph when suddely the cursor firstly jumps to a different position in the text and when I try to correct it starts to runs off all by itself creating a blank line along that line then down to the line below and so on endlessly while my text just dissapears over the horizon.

I have run full scans in ESIT Online, Commodo, House Call. I ran Malaware Bytes, uninstalled and re-installed MBAM and ran it again but the problem persists.

Grateful for you advice.

Thanks,
Blenkarni.

 

Thank you Tim W,
My PC engineer is going t o take away the machine and install new drives and re-iinstall windows without .