hash numbers for windows insiders ISO files cant be found on windows insiders site.HELP

Question

hash numbers for windows insiders ISO files cant be found on windows insiders site.HELP

fahad khan 20

Hi,

I have downloaded Windows 11 Insider ISOs from the official Windows Insider site. I tried to verify the ISO files with PowerShell.

I obtained the SHA-256 hash of the ISO using PowerShell. But there are no official SHA-256 hashes on the Windows 11 Insider site. Please help me find them.
I used two applications to verify ISO files. (1) nanaZip (2) Windows and Office ISO verifier
NanaZip says the ISO is genuine, and the Windows and Office ISO Verifier says it is not a genuine MSDN ISO.
Which application to trust?

Thanks.

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Answer 1

Vikki-T 13,230 Microsoft External Staff Moderator

Hi fahad khan,

I understand why the conflicting results are concerning, especially when there is no official SHA-256 value available for comparison.

The message from Windows and Office ISO Verifier stating that the file is “not a genuine MSDN ISO” does not necessarily mean that the ISO is modified or unsafe. Windows Insider Preview ISOs are not necessarily included in the tool’s MSDN hash database, particularly when the build is new. NanaZip and Windows and Office ISO Verifier are also third-party tools, so neither should be treated as Microsoft’s official confirmation of authenticity.

The safest approach is to download the ISO directly from the official Windows Insider Preview Downloads page. Microsoft’s current Insider ISO download page does not appear to provide a public SHA-256 list for comparison.

If you would like me to look into this more closely, please share the full ISO filename, Insider channel, build number, language, architecture, and the SHA-256 value calculated in PowerShell. Please do not include any product keys or account information. Thank you so much for your understanding.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

fahad khan 20 Reputation points

2026-09-25T07:15:36.43+00:00

hash SHA256 value is below in written form
6E619D8AD476E576A7C0E061CC74AA4AB45ABB99031B2DB57AB9129EF6ED70D3
It may contain errors; please compare it with the hash value in the image below to confirm it is correct.
fahad khan 20 Reputation points

2026-09-25T07:24:59.1166667+00:00

windows 11 26H2 build 26340.9502

AMD 64-bit Insider Preview future build.

Language: English United States.
Vikki-T 13,230 Reputation points Microsoft External Staff Moderator

2026-09-25T11:18:22.43+00:00

Hi fahad khan,

Thank you for providing the screenshots. I compared the SHA-256 value you typed with the complete value shown in the Command Prompt window, and they match, so the hash appears to have been copied correctly.

However, since I could not locate a Microsoft-published SHA-256 value for this specific Insider ISO, I am unable to compare it with an authoritative checksum or independently confirm the file’s authenticity.

You may submit a suggestion through the Windows Feedback Hub requesting that official SHA-256 checksums be published on the Windows Insider ISO download page. You can press Windows key + F, select Make a suggestion, and include the ISO filename, build number, language, architecture, calculated hash, and your screenshots.

If you would prefer direct assistance before using the ISO, you can also contact Microsoft Support and ask whether an official verification method or checksum is available for this specific Insider ISO. Please note that availability of the checksum cannot be guaranteed.

Thank you again for taking the time to provide the screenshots and complete information.