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What is the MD5 hash of the original Win 8 Professional ISO (upgrade version)? I downloaded the file over multiple download sessions, and want to make sure that the file is not corrupted.

Does the download program automatically verify the file, before prompting to install / create installation media?

Update : I went ahead and installed. Fortunately, the installation went smoothly.

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The website didn't include a tiny file to verify the CRC or MD5 hash with? Weird. – Mark Allen Nov 17 '12 at 20:41
The file was not downloaded directly from the website. It is with the Windows 8 upgrade application. – Joyce Babu Nov 18 '12 at 10:53
up vote 3 down vote accepted

The Windows8-UpdateAssistant/Windows8-Setup programs download the files into C:\ESD\Windows. Most of the files in there have a file-date of 26-July-2012, but install.esd and boot.wim have a file-date of the download date. So I wonder whether they are especially made for you. If they are, there wont be a single value MD5 hash for the ISO, because the ISO is created from those files.

I had to download the files three times before I got a version that worked. So even though there is some verification process, it doesn't seem to work very well.

In the first two attempts I created a USB boot device but during setup I got an 0x8007025D error. I tried the same files to create an ISO to use in a VM, same problem.

After the third download it worked in a VM, but not with a USB device on a real machine. I tried a different USB device and finally got it to work.

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Are install.esd and present in the iso file? – Joyce Babu Nov 17 '12 at 19:22
Yes and they are very important for the install. – Peter Hahndorf Nov 17 '12 at 19:29
"So I wonder whether they are especially made for you." - Precisely what I wanted to know as well! – Karan Nov 18 '12 at 4:10

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