How do I stop the HP hardware diagnostics loading up before login screen?

[GBisset]

Yeah it seems to of been the case as the button itself isn't sticking and works like normal but must be sticking inside as the F2 key is also the brightness reduction button so goes in hand with explaining why that was happened. So I believe once that's sorted the issue will no longer happen hopefully.

[Dudefoxlive]

almost sounds like you need a new keyboard or you need to give that one a good cleaning possibly.