For more information, please refer to "Windows 7 Startup List" in CCBoot v3.0 Wiki.

1. Choose "Start Windows Normally" to proceed.
2. On CCBoot server, double click this client in the client list, click to select the "Keep Write-back File" check box under "Client Properties" in "CCBoot Client" dialog box, then click "No" in the prompt dialog box.
3. After Windows 7 has started successfully on this client, shut it down.
4. On CCBoot server, click "Save to Image" button under "Client Properties" in "CCBoot Client" dialog box of this client.
Now, clients can boot from this image normally.

More information: comparar windows 7 versões - pxe boot windows xp