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Disabling Time Sync In Virtual PC 2007

Tuesday, June 24th, 2008

If you are like myself and use Virtual PC 2007 to check products for expiration, it is very helpful to be able to fast-forward the system clock to make sure your expiration is working properly.

The problem with Virtual PC 2007 is that if you fast-forward the clock, it will automatically re-synchronize to the host system's clock. This cannot be disabled using the settings in Virtual PC, but it can be disabled by altering the actual configuration (vmc) file itself. Please be aware that changing this clock can have adverse effects on your virtual PC image, so only do this if you are required to do so.

To disable this functionality, do the following:

1. If your machine is running, shut it down.
2. Open the .vmc file in notepad, or another non-altering text editor.
3. Navigate to /preferences/integration/microsoft and enter the following:

<components>
<host_time_sync>
<enabled type="boolean">false</enabled>
</host_time_sync>
<components>

In my case, the components element was below the video element.

Hope that helps you out!

VPC Tom out.

Comments

D said on Friday, August 15th, 2008 @ 8:55 AM

The modifed .vmc file does disable the sync time in Virtual PC 2007. You have to reboot the virtual pc after the file modification. I guess the changes need to loaded into the virtual machine's memory.

Spencer said on Friday, August 8th, 2008 @ 9:25 AM

On a related note. This is easier to change when using Virtual Server: http://support.microsoft.com/kb/867585

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