For your Mac to be able to connect to your physical PC and start the migration, you must install the Fusion PC Migration Agent on your PC.
If your Windows PC does not have a password, you must create a password before beginning the migration process. You can go to User Accounts in the Control Panel to create a password.
The VMware Fusion PC Migration Agent window appears on your PC, displaying the four-digit passcode needed for opening communications between your Mac and this PC.
The passcode is good only when the window is open. If you close the window and restart the Agent, or if you restart the PC, a new passcode replaces the old one.
Leave the PC Migration Agent running so that the Migration Assistant on your Mac can communicate with it. See Run the Migration Assistant on Your Mac.