Are you using the Update Assistant? Try the Media Creation Tool or mount the iso file. Installation may still fail, but it may fail at another stage and provide a more specific error message.
Windows 11 installation.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(188.79999999999998, 27%, 28%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERB%3C/text%3E%3C/svg%3E)
roy bartley
0
Reputation points
My computer is compatible with Windows 11. However, at 71% of Step 3 of the istallation, I receive an error code 0x8007007f. What should I do?
Windows for home | Windows 11 | Install and upgrade
2 answers
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(272, 19%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EVZ%3C/text%3E%3C/svg%3E)
Volume Z 1,470 Reputation points Volunteer Moderator2025-09-19T21:14:05.65+00:00 -
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(64, 77%, 16%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ELB%3C/text%3E%3C/svg%3E)
Lester Bernard Reyes 79,580 Reputation points Independent Advisor2025-09-19T01:04:55.0166667+00:00 Hi, I'm Bernard, a fellow Windows user. I'm happy to help!
The error 0x8007007f occurs when there is a corrupted system file or when there is a file permission error. Moreover, kindly check the device for any conflicts first:
Run the PC health check to ensure that the PC is capable of upgrading:
https://aka.ms/GetPCHealthCheckApp
Download and run the app, and if the PC is good to upgrade, I suggest doing an in-place upgrade, wherein it will upgrade the device to the latest version and repair all issues without deleting any files.
Kindly follow the steps from this link: