** My computer of 5 or 6 years age suddenly acted strangely. When switched on to
Boot up -- on the Desktop it showed the BIOS which set the computer way back in time
to 2001 Every computer has a 3v Lithium disc battery clipped onto the motherboard
It was of course that which had given up, so the BIOS memory not getting 3 volt supplied
to it ... could no longer remember what day or time was etc when one had switched
the computer off, then back on !!.
Once I removed the old 3 volt battery, placed a fresh new one in the holder the BIOS
chip began to ‘remember’ all date & time changes I made once more. Job done.
Now you know what to do if your computer looses it’s memory.