WARNING: Please do not attempt to restore the operating system or boot loaders unless the device is not booting properly. If a mistake is made in the restore process, it may be difficult to get the device to boot again, and it may require returning the device for service.

1. Execute Utility\sam-ba_2.12.exe to install the SAM-BA utility on a host PC
2. Execute Utility\sam-ba_2.12_patch5.exe to update the SAM-BA utility with the latest features and fixes.
3. Set all DIP switches on the right-side of the CUWIN CWA to the OFF position.
4. Connect the host PC to the CUWIN CWA's USB DEVICE port.
5. Turn on the CUWIN CWA. In Windows Device Manager, under the “Ports (COM & LPT)” node, you will see a new serial port appear. Note the COM# assigned to that port.
6. Set DIP switch 1 to the ON position. If you don't do this, you may receive an error in step 13 (Enabling the NandFlash).
7. Execute the SAM-BA utility installed in steps 1 and 2.
8. In the “Select the connection” drop-down list, select the “\USBserial\COM#” assigned in Step 5.
9. In the “Select your board” drop-down list, select the “at91sam9g45-ekes” option.
10. Be sure the “Customize lowlevel” checkbox is not checked. Ignore all other options.
11. Press the “Connect” button, and a new window will appear.
12. Select the “NandFlash” tab.
13. Under the “Scripts” heading, choose “Enable NandFlash” from the drop down list, and press the “Execute” button.
14. In the “Send File Name:” text box, select the “NK.nb0” file.
15. Change the “Address” to “0x200000”. If you mistakenly omit this step, or write to the wrong address, you may need to restore the first and second stage boot loaders.
16. Press the “Send File” button. The SAM-BA utility will upload the data to the CUWIN CWA's NAND Flash memory. Wait for it to finish. It should only take a few minutes.
17. Turn the CUWIN CWA off and back on again. Wait for it to boot and recalibrate the touch screen.

1. Follow steps 1~13 in the instructions above.
2. Under the “Scripts” heading, choose “Send Boot File” and press the “Execute” button.
3. Select to the “FIRSTBOOT.nbo” file in the file dialog window that appears. If your device was manufactured prior to 2018, you may need to choose the “FIRSTBOOT_InternalRTC.nb0” file instead. There is no permanent problem if you choose the wrong file; it simply won't boot. If you're not sure, try both until you find the one that works.
4. Select “Restoring the First Stage Boot Loader” at Script.
5. Press the “Open” button, and the file will be sent to the device. It will only take a few seconds to complete.
6. In the “Send File Name:” text box, select the “EBOOT.nb0” file.
7. Change the “Address” to “0x80000”
8. Press the “Send File” button. The SAM-BA utility will upload the data to the CUWIN CWA's NAND Flash memory. Wait for it to finish. It should only take a few seconds.
9. Turn the CUWIN CWA off and back on again, and the CWA should reboot.