The virtual machine MAC address changes under Virtual PC...http://blogs.msdn.com/virtual_pc_guy/archive/2005/02/15/373366.aspxMAC address management is a tricky task with virtual machines. We need to be able to generate unique MAC addresses for each virtual machine - and try to do everything we can do to avoid MAC address conflicts. Under Virtual Server we allow a user to specifyen-USCommunityServer 2.1 SP1 (Build: 61025.2)re: The virtual machine MAC address changes under Virtual PC...http://blogs.msdn.com/virtual_pc_guy/archive/2005/02/15/373366.aspx#374063Wed, 16 Feb 2005 05:45:00 GMT91d46819-8472-40ad-a661-2c78acb4018c:374063webWhat program use for backup ?re: The virtual machine MAC address changes under Virtual PC...http://blogs.msdn.com/virtual_pc_guy/archive/2005/02/15/373366.aspx#374107Wed, 16 Feb 2005 07:14:00 GMT91d46819-8472-40ad-a661-2c78acb4018c:374107Virtual PC GuyJust use 'copy' to copy the .VMC file to a safe location. <br> <br>Cheers, <br>Benre: The virtual machine MAC address changes under Virtual PC...http://blogs.msdn.com/virtual_pc_guy/archive/2005/02/15/373366.aspx#374366Wed, 16 Feb 2005 14:06:00 GMT91d46819-8472-40ad-a661-2c78acb4018c:374366Gabrielethis is a very good tip! <br>I didn't know about point #3. <br> <br>Thanks <br>