Microsoft confirms a server-side bug broke Store-based app activation, affecting apps like Notepad with 0x803F8001 error.

Microsoft's January 2026 security update has broken Windows 11 apps like Notepad and Snipping Tool, introducing dual bugs ...

Many Windows 11 users are unable to open apps on their PCs and are running into error code 0x803f8001.

Are you having trouble playing Minecraft because of the 0x803f8001 error that pops-up everytime you load the game? The complete error says: Check your account ...

Windows 11 users report Notepad, Snipping Tool, and other apps failing to open, showing Microsoft Store error 0x803F8001 on affected systems.