KB5121642 install fails Phi Silica for AMD-powered Copilot+ PCs

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KB5121642 install fails Phi Silica for AMD-powered Copilot+ PCs

W3 Walker 0

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Answer 1

Lucus-V 10,425 Microsoft External Staff Moderator

Hi W3 Walker,

To help us better understand the issue, could you please provide the exact error code and the full error message that appears when the update fails?

If possible, please also share a few screenshots of the error or the update process. Before posting any images on this public forum, make sure to remove or obscure any PII.

In the meantime, you may try fixing your system by reinstalling the current version of Windows following this article: Fix issues by reinstalling the current version of Windows.

If you have further information, please feel free to let me know.

W3 Walker 0 Reputation points

2026-07-30T19:35:22.8866667+00:00

Here's the full message from Windows update. I tried the retry option and it still fails.

2026-07 Phi Silica AI Component Update (KB5121642)

Some update files are missing or have problems. We'll try to download the update again later. Error code: (0x8007000d)
W3 Walker 0 Reputation points

2026-07-30T19:37:01.4266667+00:00

Here's the full message from Windows update. I tried the retry option and it still fails.

2026-07 Phi Silica AI Component Update (KB5121642)

Some update files are missing or have problems. We'll try to download the update again later. Error code: (0x8007000d)
Lucus-V 10,425 Reputation points Microsoft External Staff Moderator

2026-08-02T15:43:02.26+00:00

Hi W3 Walker,

Thank you for the information.

Could you please confirm whether the article suggested above was helpful and whether it resolved the issue you were experiencing? Your input is greatly appreciated.
W3 Walker 0 Reputation points

2026-08-03T04:42:34.63+00:00

finally after several days the retry succeeded. Sure would be nice if maintenance worked right the first time like it did in the way back machine.
Lucus-V 10,425 Reputation points Microsoft External Staff Moderator

2026-08-03T15:42:05.29+00:00

Hi W3 Walker,

I'm happy to hear that the problem has been resolved and appreciate your feedback.

If you have further questions, please feel free to start a topic.