So I was on Windows 8.1 and could always see my serial number in the Surface app. However, I reinstalled Winwodws 10 last week and now, when I look at the app, all I see is 12 zeros(0) for the serial number. I have uninstalled and reinstalled the app, but it still shows all zeros. Any ideas how to have it show the serial number again? Thanks. **EDIT** After rebooting a couple times, it began to show the serial number again. Not sure why it took a complete uninstall/reinstall/several reboots to finally work again.