A couple of days ago, whilst watching a Quicktime movie, there was either an Explorer or Internet Explorer error (not sure which, sorry). When I pressed the button to report the problem the computer rebooted. There didn't seem to be any problems with the reboot, although it did check the disk for errors (which it corrected). When it reached the Logon screen, I shut it down again.
Next morning, when I pressed the power button on the front of the machine, the computer lights came on, but it didn't start booting up - the screen remained blank and the printer did not initialise. It only booted up when I turned it off and on again by the power switch at the back of the computer. When it did boot up, it displayed "Updated ESCD correctly" at the bottom of the boot screen.
The computer appeared to operate normally once it had booted. It was shutdown again overnight and this morning when I came to boot it up, I had to use the on-off switch at the back of the machine again. When it started up, it went straight into the BIOS setup. It said something about the computer struggling to maintain CPU speed on the last bootup and to check it was set correctly - which it was.
I exited the BIOS and the computer booted normally (I didn't notice if it said Updated ESCD this time).
So what the heck is going on here? Have my BIOS settings somehow been changed? What can I do to fix it?