Vmware Converter - Converting a Computer fails with the error "Unable to start the change tracking driver"

This issue is outlined in this Vmware KB article

Vmware Converter Error

When you try to convert the computer and you have selected to Synchronise Changes the error is displayed.

Disable UAC

The problem is caused because the converter tries to change the UAC policy.

Turn off UAC

By turning off the UAC you can convert the computer and then switch this back on. Once you have changed this you will need to reboot for this to take effect.

Restart Conversion

Now your conversion will run correctly and get past the 1% stage.