virtual machine not starting

hi am having this error when trying to start my virtual machine
error
chalie001Asked:
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JohnBusiness Consultant (Owner)Commented:
The error suggests you may have changed the machine parameters before you started it.

Do you have a backup copy of the machine you can use?

Do you recall what you might have changed, and can you then change it back?
chalie001Author Commented:
I don't know what I have changed its new virtual machine
JohnBusiness Consultant (Owner)Commented:
Try restarting the host machine and then see if the VM starts.
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Microsoft Virtual Server

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