Microsoft KB Archive/67943

= System Doesn't Save Time and Date Changes =

Article ID: 67943

Article Last Modified on 5/12/2003

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APPLIES TO


 * Microsoft MS-DOS 3.21 Standard Edition
 * Microsoft MS-DOS 3.3 Standard Edition
 * Microsoft MS-DOS 3.3a
 * Microsoft MS-DOS 4.0 Standard Edition
 * Microsoft MS-DOS 4.01 Standard Edition
 * Microsoft MS-DOS 5.0 Standard Edition
 * Microsoft MS-DOS 5.0a
 * Microsoft MS-DOS 6.0 Standard Edition
 * Microsoft MS-DOS 6.2 Standard Edition
 * Microsoft MS-DOS 6.21 Standard Edition
 * Microsoft MS-DOS 6.22 Standard Edition

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This article was previously published under Q67943



SYMPTOMS
You use the MS-DOS TIME and DATE commands to change the time and date on your system, but the system time and date are not saved when you reboot.



CAUSE
This error occurs if you are using a version of MS-DOS earlier than 3.3. Versions of MS-DOS earlier than version 3.3 do not update the CMOS time/date chip.



RESOLUTION
If you are using a version of MS-DOS earlier than 3.3, you can use the CMOS setup utility provided by the computer manufacturer to change CMOS settings.



MORE INFORMATION
Only AT-class machines store the time/date information in standard CMOS memory. XT-class machines do not have a built-in mechanism for storing the time and date. Manufacturers of XT-class machines sometimes add a clock/calendar chip to their systems. MS-DOS does not recognize this hardware unless the system is running a version of MS-DOS that has been modified by the manufacturer to work with their hardware.

If an AT-class system running MS-DOS 3.3 or later continually loses the time and date, the battery that powers the CMOS memory may need to be replaced.

Additional query words: 6.22 3.20 3.21 3.30 3.30a 4.00 4.01 5.00 5.00a 6.00 6.20 \* yeswin4

Keywords: KB67943

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