Windows recognizes the board as "Unknown Device"

The ZED-F9P USB port Product ID will be reset after a firmware update. Some old Windows versions prior to Windows 10, might recognize the device as “unknown device”. If this happened to you…
First confirm that this is your problem:

• You should see a new “Unknown Device” when you connect the board to the PC and should disappear when you disconnect.
• Go to u-center > Message View > UBX-CFG-USB. If product ID is 01A9, you are experiencing this issue and you need to change it to 01A8.

Now how to solve it:

• Find a PC with Windows 10, so you can communicate with the ZED-F9P again. Or if you have serial to USB adapters, use UART1 TX1 RX1 to communicate with ZED-F9P
• Go to u-center > Message View > CUSTOM (at the very bottom).
• Paste the following string and Click Send.

B5 62 06 1B 6C 00 46 15 A8 01 00 00 00 00 00 00
02 00 75 2D 62 6C 6F 78 20 41 47 20 2D 20 77 77
77 2E 75 2D 62 6C 6F 78 2E 63 6F 6D 00 00 00 00
00 00 75 2D 62 6C 6F 78 20 47 4E 53 53 20 72 65
63 65 69 76 65 72 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 7D 36

• Go to u-center > Message View > UBX-CFG-USB. Check that now the Product ID is 01A8.
• Go to u-center > Message View > UBX-CFG-CFG. Click Send.
• You can now disconnect and connect the board again and it should work.