Each time the computer boots I receive a prompt for the time and date

Each time the computer boots I receive a prompt for the time and date:

Issue:
Each time the computer boots I receive a prompt for the time and date.

Cause:
Missing autoexec.bat / config.sys.
Bad or missing CMOS / RTC battery.

Solution:
If your computer has been able to keep the time and date in the past, however has suddenly begin prompting you for the time and date and you are running Microsoft Windows 95, Windows 3.x, or MS-DOS verify that the computer has an autoexec.bat and config.sys file on the computer. If this file is missing it will need to be recreated or restored from a backup.
It is common for computers using a Intel 80286 and lower processor to not have a CMOS / RTC battery. If your computer does not have a CMOS / RTC battery, this is functioning as designed.
If you have a computer later than a 80286 or a computer that has been built in the last few years it is likely that your CMOS or RTC battery has died. Contact your computer and/or motherboard manufacturer to purchase a replacement battery.

Compiled By Prin Stianingsih
Source = http://www.computerhope.com/issuess/