Weird time issue on a virtual Windows 2008 R2

I have a weird issue on a virtualized Windows 2008 R2.

Sometimes the time of the virtual machine shifts of 25 minutes, I found these entries in the system logs:

source: Kernel-general
The system time has changed to ‎2019‎-‎12‎-‎04T06:54:35.761074800Z from ‎2019‎-‎12‎-‎04T07:20:42.987289700Z.

The difference is always around 25 minutes, the host is VMware ESXi, 5.5.0, 2068190 running on HP a ProLiant DL580 Gen9

What I have checked:

* the VMtools are updated (9354)
* the option “Syncronize guest time with host” is disabled
* at the moment this is the only VM running on the host

What can be the origin of the problem? The host ? The guest ?

The connection with local DC/timeserver seems ok:

C:\w32tm /query /status

Leap Indicator: 0(no warning)
Stratum: 6 (secondary reference – syncd by (S)NTP)
Precision: -6 (15.625ms per tick)
Root Delay: 0.1465912s
Root Dispersion: 4.1277392s
ReferenceId: 0x0AA22006 (source IP: xx.zz.yy.ww)
Last Successful Sync Time: 04.12.2019 14:30:56
Source: LOCALDC.localdomain
Poll Interval: 10 (1024s)

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  1. Check that the VM is set for the correct operating system – I’ve seen situations where a windows box set up as a “linux OS” in the VM object creates these kind of problems.

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