Windows Clock on PXI Controller Repeatedly Loses Time

Updated Jun 15, 2018

Reported In


  • PXI Controller

Operating System

  • Windows

Issue Details

  • My PXI or PXIe controller's clock repeatedly loses its time. Why is this happening?
  • Why does my Windows time reset to 12:00 AM every time I boot my PXI controller?
  • My PXI computer doesn't retain the operating system time between boots.


This issue may be as as a result of the BIOS software or possibly the need to replace the CMOS battery. Therefore, there are two possible solutions to this issue.

1. Ensure that the current version of the BIOS is up to date. Please see Determining and Upgrading PXI and VXI Embedded Controller BIOS Versions for more information.

2. Replace the CMOS battery in the controller. Please see PXI and PXIe Controllers Replace Battery for more information.

Additional Information

For a Windows XP controller, this issue may be due to the Internet Time Server or Time service in the local system. Please see Windows XP losing time for more advice on how to resolve this issue.


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