Hi Mark,

Thank you for your reply. We have made progress on the issue. Now we know
the issue only occurs when using UI sync time.

Before moving on, I would like to let you know UI doesn't use time service
when sync time. So we can focus on the UI component. I have following
suggestions:

1.Try to switch to other time server, such as time.nist.gov or
time-a.nist.gov. Does it work?
2.Run SFC to scan system files to check if it is caused by corrupt system
file.

Use the System File Checker (SFC) to scan system files
=====================================================
The System File Checker tool enable an administrator to scan all protected
files to verify their versions. To do so, follow these steps:

1. Click "Start", type "CMD" (without quotation marks) in the "Start
Search" box. Right click on the "CMD.exe" file, choose "Run as
Administrator"
2. Copy and paste "SFC /Scannow" (without quotation marks) in the "Open"
box, and click "OK".

Note: There is a SPACE between "SFC" and "/Scannow", this command will take
several minutes to complete and may require access to the Windows
installation source files. If you are prompted to insert the CD, click
"Continue" each time it prompts.

Does it work? Hope it helps.

Best regards,

Robinson Zhang
Microsoft Online Support