In order to install this driver for Windows 7 you must follow these steps:

1. Open your control panel. (Click Start - Click Control Panel)

2. Open your device manager. (Click System and Security - Click Device Manager under System)

3. Open the properties for the connected device. (Connet the Printrboard and Double Click on the new device)

4. Click Update Driver.

5. Click Browse my computer for drive software.

6. Click Let me pick from a list of device drivers on my computer.

7. Select Show All Devices and Click Next.

8. Click Have Disk...

9. Click Browse and browse to the INF file in this directory and Open it (LUFA CDC Bootloader.inf)

10. Click OK.

11. Click Next.

12. Click Yes.

And that's it. You should be able to connect to the Printrboard now.