Fix Microsoft Store sign-in error 0x801901f4 on Windows

If when you attempt to sign in to the Microsoft Store or any other service with your Microsoft Account on your Windows 10 PC and you encounter the error code 0x801901f4, you can try the solutions we will present in this tutorial to successfully remediate this issue. 1] Reset the Microsoft Store cache via Settings 2] Create a new User Account 3] Run SFC and DISM scan 4] Re-register Microsoft Store 5] Perform System Restore Timecodes: 0:00 Intro 0:29 Reset Microsoft Store cache 0:50 Create new user account 0:57 Run SFC Scan 1:27 Re-register the Microsoft Store 1:57 Perform System Restore