I have a problem with the Backspace key. When I press backspace it deletes one character (to the left) as expected but then the cursor moves one character to the right.
Also when I hold spacebar down nothing happens, nothing is deleted.

The same thing happens with the Delete button, deletes one character and moves the curser one character to the right again.

But if I press Fn + NumLK or Fn + Scr LK it corrects itself until something changes it again, I’m not sure what.

It happens with all software when entering text, I've un-installed the keyboard drivers, no luck

I've also noticed that when error messages or information messages pop up, the default button thats highlighted is the cancel or no button when usually yes or ok is default, and In excel when i press enter the cursor moves to the cell below but the horizontal scroll bar moves the page to the right each time i hit enter.

I've also done a virus scan

Any help please????