If you are encountering the 0xC1900101-0x40021 Windows 11 upgrade error, execute the solutions given below. An outdated BIOS is the primary cause of the 0xC1900101 ...
Share on Facebook (opens in a new window) Share on X (opens in a new window) Share on Reddit (opens in a new window) Share on Hacker News (opens in a new window) Share on Flipboard (opens in a new ...
Update on June 2, 2025: Microsoft recently released update KB5062170, an out-of-band hotfix for the previously released May update for Windows 11 23H2 and 22H2 that’s been wreaking havoc for some ...