So little is told that I can't tell if it's that or that rootkit that we discussed recently.

What rootkit? We found it with RKILL noted by Grif in this link.;msg5099421

The no power to the keyboard is a sign that something hardware has failed but there is no make or model given.

YES, power supplies do age and can be fine for a year then as the capacity drops your new PC builder often writes it was fine when new. We then get to discuss why it ages and why we install a bigger PSU (capacity) than we need.