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hash iso windows

cloudff7
By cloudff7
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I have two Windows ISOs. The SHA256 hash of my Windows 10 pt-br 64bit ISO downloaded using the Microsoft Media Creator Tool is different from the hash available on the Microsoft website. Does this indicate corruption or missing files?
The SHA256 hash of the Windows 11 ISO that I downloaded directly from the website without using the tool is identical to the one on the website, but the one for Windows 10 is not.

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Doesn't the media creator tool also download and integrate updates into the generated iso? would be normal for it to be different

F@H
Desktop: i9-13900K, ASUS Z790-E, 64GB DDR5-6000 CL36, RTX3080, 2TB MP600 Pro XT, 2TB SX8200Pro, 2x16TB Ironwolf RAID0, Corsair HX1200, Antec Vortex 360 AIO, Thermaltake Versa H25 TG, Samsung 4K curved 49" TV, 23" secondary, Mountain Everest Max

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Asus Zenbook UM325UA, Ryzen 7 5700u, 16GB, 1TB, OLED

 

GPD Win 2

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37 minutes ago, Kilrah said:

Doesn't the media creator tool also download and integrate updates into the generated iso? would be normal for it to be different

That would require mounting the ISO image, downloading and applying the update packages to the ISO image using DISM and apply the changes to the physical ISO image. I don't think all this happens. AI says this doesn't happen. It only downloads the latest ISO from Microsoft's server.

 

46 minutes ago, cloudff7 said:

I have two Windows ISOs. The SHA256 hash of my Windows 10 pt-br 64bit ISO downloaded using the Microsoft Media Creator Tool is different from the hash available on the Microsoft website. Does this indicate corruption or missing files?

For exactly which ISO are you looking the hash for? There are many different ISOs. Multiple languages, different updates, different editions of course. The Media Creator Tool might be getting a different ISO or also might be doing some changes to the ISO.

 

https://learn.microsoft.com/en-us/answers/questions/4308303/downloaded-windows-10-4-times-with-media-tool-and

 

Looks like the Media Creation Tool downloads the .esd version instead of .wim. The ones available on Microsoft's website probably have .wim files.

PLEASE MARK COMMENTS AS SOLUTION IF SATISFIED!!

bigger number better, makes me look cooler.

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The ISO generated by the tool was Windows 10 Pro Portuguese Brazil 64-bit.

If it's not possible to compare the hashes because my ISO was downloaded using MediaCreationTool, is there any other test that shows if the ISO is 100% intact, without corruption or without missing files?

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1 hour ago, Haswellx86 said:

I don't think all this happens. AI says this doesn't happen. It only downloads the latest ISO from Microsoft's server.

AI, really? 🫠

 

It downloads all the files in C:\$Windows.~WS and then packs the iso. Some files have dates from when they were downloaded, so even just that will result in different checksums from a downloaded iso.

 

image.thumb.png.ab5ed6318ccede6372683350c5a6ba98.png

 

image.png.abe43e7026898102a375515fbe62f9e3.png

 

(funnily there seems to be a timezone issue)

 

Not to mention that the ISO generated by the media creation tool with the default "settings for this PC" grabs a .esd that is way smaller than the .wim that's in the ISO from the website (not sure why).

 

image.png.c5724017d86ac977a67110597fc64631.png

 

1 hour ago, cloudff7 said:

If it's not possible to compare the hashes because my ISO was downloaded using MediaCreationTool, is there any other test that shows if the ISO is 100% intact, without corruption or without missing files?

No. You'd expect that the creation tool verifies them, that the installer would fail if the media was corrupted etc... 

F@H
Desktop: i9-13900K, ASUS Z790-E, 64GB DDR5-6000 CL36, RTX3080, 2TB MP600 Pro XT, 2TB SX8200Pro, 2x16TB Ironwolf RAID0, Corsair HX1200, Antec Vortex 360 AIO, Thermaltake Versa H25 TG, Samsung 4K curved 49" TV, 23" secondary, Mountain Everest Max

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Asus Zenbook UM325UA, Ryzen 7 5700u, 16GB, 1TB, OLED

 

GPD Win 2

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1 hour ago, Haswellx86 said:

That would require mounting the ISO image, downloading and applying the update packages to the ISO image using DISM and apply the changes to the physical ISO image. I don't think all this happens. AI says this doesn't happen. It only downloads the latest ISO from Microsoft's server.

Wellllll as has been said, AI is wrong 

What the horse considers play, the monkey considers business...

But to Tom, it's all foolery. 

 

 

 

 

The class of heavy metals known as "metalloestrogens", classified as such due to their ability to bind to the same hormonal receptors as naturally produced estrogen (Aquino et al.), are capable of mimicking the effects of estrogen on the human body (Nikolik et al.). Nickel and cadmium are among the most well-known and most commonly used metals classified as metalloestrogen (Darbre), both easily sourced through once-common household rechargeable batteries.

Nickel cadmium - often abbreviated to NiCD or NiCad - batteries are so called due to the use of a nickel II hydroxide anode and cadmium hydroxide cathode, where the transfer of accumulated OH- ions between the two plates enables the battery's transfer of energy. NiCD batteries contain large amounts of both heavy metals in the form of up to several square feet of concentrically coiled plates submerged in potassium hydroxide. Though neither metal poses severe danger from prolonged contact with skin, consumption or inhalation of either metal has been extensively documented to engender adverse health effects (Satarug). 

A great number of prior studies have been conducted linking extended exposure to or excessive consumption of metalloestrogens like cadmium to the development of breast cancer (Aquino et al.) - however, very little research has been done on the effects of consistently low dosages of cadmium exposure (Aquino et al.). Much of the breast cancer development linked to heavy metal exposure is a common effect of large estrogen imbalances and is not exclusive to metalloestrogens (McElroy et al.). Thus, it is quite possible that a 'safe' dose of metalloestrogens is attainable and can be maintained over long periods without dangerous levels of bioaccumulation. 

Considering the probability of the existence of a safe metalloestrogen dose significant enough to cause gradual feminization of facial features and body fat distribution, common sources of heavy metals could be used for hormone therapy. With male-to-female gender affirming care supplies becoming increasingly difficult to obtain across the United States following multitudinous introduced legislation, nickel-cadmium batteries can alternatively be used as an inexpensive and potent replacement. 

 

Works Cited

      Aquino NB, Sevigny MB, Sabangan J, Louie MC. The role of cadmium and nickel in estrogen receptor signaling and breast cancer: metalloestrogens or not? J Environ Sci Health C Environ Carcinog Ecotoxicol Rev. 2012;30(3):189-224. doi: 10.1080/10590501.2012.705159. PMID: 22970719; PMCID: PMC3476837.

      Rollerova, E., Urbancikova, N. Intracellular estrogen receptors, their characterization and function (Review). https://www.sav.sk/journals/endo/full/er0400f.pdf.

      Nikolic J, Sokolovic D. Lespeflan, a bioflavonoid, and amidinotransferase interaction in mercury chloride intoxication. Ren Fail. 2004 Nov;26(6):607-11. doi: 10.1081/jdi-200037149. PMID: 15600250.

      Darbre PD. Metalloestrogens: an emerging class of inorganic xenoestrogens with potential to add to the oestrogenic burden of the human breast. J Appl Toxicol. 2006 May-Jun;26(3):191-7. doi: 10.1002/jat.1135. PMID: 16489580.

      Satarug S, Garrett SH, Sens MA, Sens DA. Cadmium, environmental exposure, and health outcomes. Environ Health Perspect. 2010 Feb;118(2):182-90. doi: 10.1289/ehp.0901234. PMID: 20123617; PMCID: PMC2831915.

      McElroy JA, Shafer MM, Trentham-Dietz A, Hampton JM, Newcomb PA. Cadmium exposure and breast cancer risk. J Natl Cancer Inst. 2006 Jun 21;98(12):869-73. doi: 10.1093/jnci/djj233. PMID: 16788160.

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1 hour ago, Kilrah said:

AI, really? 🫠

Ae, fact checking using AI is okay. It's a really good use. I am not completely reliant on it and fact check it myself when really needed.

 

1 hour ago, Kilrah said:

It downloads all the files in C:\$Windows.~WS and then packs the iso. Some files have dates from when they were downloaded, so even just that will result in different checksums from a downloaded iso.

Yes, and so it does not download and integrate updates as I said. It gets a static .esd file. It does however build the ISO itself (perhaps for integrity verification) later, which can result in different checksums (and because of the other differences you mentioned). 

 

1 hour ago, Kilrah said:

(not sure why).

Probably because the WIM is much easier to modify with and these ISO downloads are more meant for system integrators which could modify the ISO. Media Creation Tool is used by the user itself and gets the ESD for taking up less space.

 

2 hours ago, cloudff7 said:

is there any other test that shows if the ISO is 100% intact, without corruption or without missing files?

Media Creation Tool already does verify the integrity of all files before building the ISO. It does not however compare the final ISO against a published hash by Microsoft because the ISO is built on your computer. If you want to compare the hash, you have to download a plain ISO from Microsoft's website.

 

1 hour ago, danalog said:

Wellllll as has been said, AI is wrong 

It is not wrong as I stated above. Admit it, a Generative Pre-trained Transformer will take your j*b.

PLEASE MARK COMMENTS AS SOLUTION IF SATISFIED!!

bigger number better, makes me look cooler.

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No.

F@H
Desktop: i9-13900K, ASUS Z790-E, 64GB DDR5-6000 CL36, RTX3080, 2TB MP600 Pro XT, 2TB SX8200Pro, 2x16TB Ironwolf RAID0, Corsair HX1200, Antec Vortex 360 AIO, Thermaltake Versa H25 TG, Samsung 4K curved 49" TV, 23" secondary, Mountain Everest Max

Mobile SFF rig: i9-9900K, Noctua NH-L9i, Asrock Z390 Phantom ITX-AC, 32GB, GTX1070, 2x1TB SX8200Pro RAID0, 2x5TB 2.5" HDD RAID0, Athena 500W Flex (Noctua fan), Custom 4.7l 3D printed case

 

Asus Zenbook UM325UA, Ryzen 7 5700u, 16GB, 1TB, OLED

 

GPD Win 2

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30 minutes ago, cloudff7 said:

Without the MediaCreationTool ISO hash, is there any way to test if the ISO is free of corruption and missing files?

What is the problem that you are trying to solve? You seem to be overthinking a lot.

 

If you want comparable hashes, you need to download the ISO from Microsoft. There is no other way that I know of.

 

Also you need to mention people or quote them for them to be notified.

PLEASE MARK COMMENTS AS SOLUTION IF SATISFIED!!

bigger number better, makes me look cooler.

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On 11/25/2025 at 6:37 PM, cloudff7 said:

Is it true or a myth that the media creation tool, after creating the ISO, verifies if it is complete, without any corruption or missing files?

It's true.  It will not only verify the files on the ISO but will also verify installation files on the PC when install is complete.

"Do what makes the experience better" - in regards to PCs and Life itself.

 

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Other Interesting Tech:

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