How to fix Windows update failure (error code 0x80070306)?

Question

How to fix Windows update failure (error code 0x80070306)?

ChaeHee Won 25

Hello,

I got Windows update failure with error code 0x80070306.

I have Windows 11 Pro and Windows version 24H2 (OS Build 26100.6584).

I retired Windows update lots of times, but it always failed with the same error code.

0 comments

Answer accepted by question author

0 additional answers

Your answer

Answer 1

Arlene D 36,205 Independent Advisor

Hi, the error code 0x80070306 usually means the update files are damaged, or something interrupted the process. Did this start after a recent update or has it been ongoing? Try running the Windows Update Troubleshooter under Settings > System > Troubleshoot > Other troubleshooters, then select Windows Update and Run. Restart your PC and check again. If it still fails, open Command Prompt as Administrator and run sfc /scannow followed by DISM /Online /Cleanup-Image /RestoreHealth. If the problem continues, use the Windows 11 Installation Assistant from Microsoft’s official site to repair your system without losing your files.

Natasha S 0 Reputation points

2025-10-23T09:04:57.57+00:00

I have tried this and had to do this for the past 2 updates over the last 24 hours. I just wiped my computer in August, didn't keep any files and installed a clean version of Windows 11. I really don't want to go through that process.

Install error - 0x8007030611

I am trying to find the standalone update (26120.6972), am having a difficult time with the catalog.

Any suggestions?

Natasha
ChaeHee Won 25 Reputation points

2025-10-24T13:28:26.7733333+00:00

I have tried all your suggestions. Windows 11 Installation Assistant is only working for me.

Thanks for your help.