How to disable Time Synchronization under Windows Virtual PC
In some circumstances you need to disable the automatic time synchronization with your host which occurs per default every 15 seconds.
I had tested the described scenario from Ben Armstrong (Virtual PC Guy) and it works as well for Windows Virtual PC under Windows 7.
Find your *.VMC file of your virtual machine and search for the following section :
<host_time_sync>
<enabled type="boolean">true</enabled>
<frequency type="integer">15</frequency>
<threshold type="integer">10</threshold>
</host_time_sync>
If you want to disable time synchronization then change the yellow marked parameter to “false” and reboot your VM.
<host_time_sync>
<enabled type="boolean">false</enabled>
<frequency type="integer">15</frequency>
<threshold type="integer">10</threshold>
</host_time_sync>
Kudos to Ben –>https://blogs.msdn.com/virtual_pc_guy/archive/2007/11/28/disabling-time-synchronization-under-virtual-pc-2007.aspx