One keyboard key acts as 2 at once

[BowTies28]

My keyboard has been bugging out recently. Two keys share one key. When I press the I key on my keyboard it activates both the I and ALT at the same time, this also happens vice versa. For my R key it will activate R and 1, same case with the I and ALT key, the L key which uses the L and Menu key This also happens with ENTER and -/_ . I have tried this on other computers and the problem persists. I have reinstalled drivers multiple times.

• I'm running Windows 7 64 bit
• The keyboard I'm using is a Logitech G105

[BowTies28]

So I  found out that my delete button on the numpad is linked to the backlight settings on my keyboard

[somethingawsome]

Sounds like a keyboard issue to me. The fact that its not just "system keys" (I mean letters, modifiers, numbers) and is effecting the backlight key too is telling me its not software!