Changing the battery did not solve the problem
I had to reinstall XP again after I got the standard message that 'a problem has been detected and Windows has shut down to prevent damage to your computer'
Sometimes this message loops and the only alternative I have is to reinstall XP. Sometimes it doesn't loop and I am able to try and find the problem which seems to get harder the longer it goes on
Ths standard messages do not seem to give me a clue on how to solve the problem-the last two quote ACPI.SYS and PCI.SYS.
I found out I was getting a message before XP startup-'Primary IDE Channel no 80 conductor cable installed' I have changed the cable and hope this will sort out the problem.
Am now in the process of reinstalling XP for the sixth time