WinImage converts VMDKs to VHDs
I have raved about the benefits of WinImage before but now with the latest version (8.10) it allows you to convert VMware virtual hard disks (VMDKs) to Virtual PC / Virtual Server virtual hard disks (VHDs) - which is pretty cool.
Note that it does not do any system reconfiguration - so if the VMDK is a system drive it might have problems booting under Virtual PC / Virtual Server.
You can download WinImage from here: https://www.winimage.com/download.htm
Cheers,
Ben