This is an ongoing news story. We will update this piece as more information becomes available.
Windows 11 users are having a nightmarish start to their day. The error code 0x803f8001 is appearing for many trying to open apps on their PC. File system error (-2143322111) also appears on affected systems.
A post on a Microsoft forum by user “Kave” shared frustrations recently:
“Getting the error code 0x803f8001 for most my microsoft apps including my Notepad app which has important information and URLS i need for my job. This is getting pretty paralyzing. I can see other people saying they cannot open stuff like Alienware command center, Nitrosense, Snipping tool, etc with the same error code today.”
According to Harold Milan, an Independent Advisor who replied to the post, that occur often occurs when the Microsoft Store cannot validate app licenses.
“In most cases, this is due to a corrupted Store cache, a temporary Microsoft account sync issue, or a Store registration glitch rather than actual data loss,” said Milan.
Windows 11 won’t allow me to open notepad.exe because of.. some error linked to my Microsoft account?It’s getting harder to defend the weird choices this company makes in its world-leading OS :face_with_spiral_eyes: pic.twitter.com/WAYjlhGdWCJanuary 21, 2026
A Reddit thread illustrates that the error affects more applications. Specifically, Armoury Crate is not able to load for some users.
Our team is trying to remedy the issue on our respective PCs, but we have not found success yet.
Specifically, we have tried resetting the Microsoft Store app on a PC, but to no avail.
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