How to fix AppVIsvSubsystems64.dll?

Question

How to fix AppVIsvSubsystems64.dll?

CHAN, Yiu Sang 20

Recently, I have experienced an error with any Office App (Excel / Word...), stating there was an image error: "AppVIsvSubsystems64.dll is either not designed to run on Windows or it contains an error. Try installing the program again using the original installation media or contact your system administrator or the software vendor for support. Error status 0xc000012f."

So far, I've tried (1) running command prompts of
DISM /Online /Cleanup-image /Scanhealth
DISM /Online /Cleanup-image /Restorehealth
sfc /scannow
(2) Downloading online redistributions of the AppVIsvSubsystems64.dll file and replacing them with the original ones (upon failing, I replaced them with the old files).
(3) Checking that the same issue persists with a new user.
(4) Uninstalling and reinstalling Office, but it states there is an error to uninstallation, with an error code of 30045-44(1), which when pressing on the link to More Information, Microsoft states that such site "cannot be found".

All of the above have failed. My tablet is a Surface Pro.
Is there any other way to solve this issue? Thank you!

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Answer 1

Mia - Tr 3,970 Microsoft External Staff Moderator

Hi @CHAN, Yiu Sang,

Thank you for posting in Microsoft Q&A Forum.

Regarding to your description, could you please share a few more details?

May I know which office version and which windows version that you are using.
You mentioned that the issue persists with a new user. Could you please clarify if the “new user” means signing in with another account, as shown in the screenshot below?

In the meantime, I'd recommend you trying to repair office via this article: Repair an Office application

Also, I found a related discussion that might help you check if the issue still occurs: officeclicktorun.exe bad image 0xc000012f - cant install microsoft 365

Thank you for your valuable time, I'm looking forward to your response.

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

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CHAN, Yiu Sang 20 Reputation points

2025-07-26T05:40:59.3166667+00:00
Thank you for your reply!

I'm using Microsoft 365 corporate version (in traditional Chinese, version: 16.0.18925.20158), and I'm on windows 11.

I added a test user to "Other users", yet the issue persists.

I've also tried carrying out the steps in the article mentioned, yet in the Click to Repair window, the same error code 30045-44(1) popped up.

Here are the redistributable codes I've downloaded, but none of them have worked so far. I assume my surface pro runs on arm64 processor, but I tried the remaining ones anyway.

Would there be any other way to solve this issue? Thank you very much!
Mia - Tr 3,970 Reputation points Microsoft External Staff Moderator

2025-07-28T14:38:27.58+00:00
Hi @CHAN, Yiu Sang,

Thank you for the update.

From what you've shared and based on my understanding, the issue may come from the corrupted Office installation files, missing or incompatible, or registry issues preventing clean uninstalls/repairs, therefore, I recommend you need to be more thorough cleanup and reinstall the office.

You can try to use the Microsoft Support and Recovery Assistant to complete office uninstall.

If the error still occurs, you may need to combine this with a manual uninstall by following the steps in this article: Uninstall Microsoft 365 from a PC.

Additionally, you might consider using the Windows Reset option:

Settings > Update & Security > Recovery > Reset this PC (choose “Keep my files”)

*Note: Don’t forget to back up your data first.

Thank you for your time, if you have any further question or concern, please feel free to let me know.
Mia - Tr 3,970 Reputation points Microsoft External Staff Moderator

2025-07-30T11:47:32.2333333+00:00

Hi @CHAN, Yiu Sang

Good day and I hope you're doing well.

It has been a while and I am writing to see how things are going with this issue. Have you encountered any difficulties, or is there anything else I can assist you with?

Thank you for your valuable time.
CHAN, Yiu Sang 20 Reputation points

2025-07-30T16:03:16.8366667+00:00

Thank you very much! I tried restarting the PC, and it has successfully recovered the Office files. Thank you for your assistance!
Mia - Tr 3,970 Reputation points Microsoft External Staff Moderator

2025-08-01T05:55:33.5733333+00:00

Hi @CHAN, Yiu Sang

Glad to hear your issue has been resolved now.

Coud you please kindly mark my reply as accepted answer? This could help others in a similar situation quickly find relevant information and supports the community.

Your input is greatly appreciated and helps improve the experience for everyone. If there’s anything else I can do to assist, please don’t hesitate to let me know.

Thank you for your contribution.

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How to fix AppVIsvSubsystems64.dll?

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