The BIOS clock does not work after upgrade to Windows 7

XW4300 workstation has been recently updated to Windows 7 from XP pro.  After the update, the system clock did not keep accurate time, then I entered the BIOS Setup and set the time here.  After several hours, I rebooted, entered the BIOS configuration and noticed clock BIOS had not changed.  I replaced the CMOS (CR2032) battery with three different batteries and BIOS clock does not always change.

Occasionally, Windows 7 system clock will synchronize to the BIOS clock, which creates the incorrect time in Windows. I can see these events in the system event log.

Is it possible that this problem is related to the Win 7 upgrade, or is it a problem without a report?  Suggestions to control or fix the BIOS clock beyond what has been done so far?  If I can't fix the BIOS clock, is it possible to prevent the synchronization of the clock in the BIOS Win 7?

ERICO wrote:

Replace the jumper CLRCMOS or CLRRTC to its original position after erasing the CMOS memory and flashed the BIOS? If you do not then the time will be reset whenever you turn off the PC.

I have not found a CLRRTC jumper on the 4300.  Is there a jumper to reset the password (E49), and a CMOS reset button.

However, I tried to reinstall the battery with power supply cable disconnected, and it reset the CMOS all anyway.  Reset the CMOS seems to have solved the problem.  BIOS clock has now begun to follow the exact time again.  I rebooted several times now, and the time is now correctly.

Thank you all for your suggestions.

Tags: HP Desktops

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