Start a topic about your issues in Users or Beginners Help sections of the forum.
Pick one computer to work on.
Give detailed info on what it is and what it is doing.
Need to look at each computer, one at a time.
But first.
Have you replaced the CMOS battery in any of these computers?
CMOS battery
A battery that maintains the time, date, hard disk and other configuration settings in the CMOS memory. CMOS batteries are small and are attached directly to the motherboard.