Hi Rathank Phoung,
Welcome to Microsoft Q&A!
The error 0x800f081f during a Windows Update is typically related to corrupted system files or conflicts with existing software that prevent the update from installing correctly. You can refer to the solutions mentioned in this thread: How to fix Install Error - 0x800f081f - Microsoft Q&A
On top of that, I have an additional suggestion as I also encountered this same issue recently. I can see that your system is prompting for Windows 11 versions 25H2, so it might be more thorough (and possibly quicker) to perform an In-place Upgrade: How to run In-place upgrade in Windows 11 - Microsoft Q&A. Doing that helped make my system up to date while skipping all the problematic updates:
- If your storage has more than 8GB free space > Download Windows 11
- Remember to choose the same language as your current system
- If you don't have enough space, you have to create a bootable installation media
- Mount the
.ISOfile > Runsetup.exe> let it run and follow the instructions - Check Keep personal files and apps when prompted
Disclaimer: An in-place install or in-place upgrade will refresh your Windows files and operating system without removing files or applications. That being said, we always recommend that if you have important data, you should back it up before making large system changes. If you want to back up your data first, please do so.
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