Oh Whoah... now I've REALLY done it !
I installed and ran PCdecrapifier. Then I ran Privacyeraser Pro, then, Ccleaner, then a hard boot, to ensure (that) I have really killed some stuff.
A lot of the stuff , I didn't have a clue about. Just took wild crazy guesses.
Mostly, I got rid of anything that was HP.
What an absolutely and dangerous knife, that was.
I haven't had so much fun for ages !