Time Sync Problem Windows Domain

I have three domain controllers, 2 are 2003 r2 and 1 is 2008 r2.  The PDC controller is a 2003 r2 machine and it holds all of the fsmo roles.  I have been syncing with a local external time server for over a year with no problems but recently I have noticed that the time is out, fast by about 7 minutes.  I have checked all the settings and reset them up so that the PDC DC is the only one syncing with an external source and all the others sync from it.
I have tried other time servers but get the same result.

When I run a w32tm /resync /rediscover on the PDC DC, it changes the clock to the correct time but only for 10 seconds and then reverts back to the wrong time.

When I run w32tm /monitor, it shows the PDC syncing with the external source and the other 2 syncing from the PDC and all are the same time so at least thats right!

Help! I dont know what else to do but I really want the right time.

Thanks in advance
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Darius GhassemCommented:
Are you running the servers has virtual servers? If you are running Virtual software go into the settings of the VM disable time sync with host

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mwelf1Author Commented:
Awesome!  So easy yet so hard to find!

Thanks heaps for the prompt solution
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Windows Server 2003

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