Sigh... Doesn't work. I don't know why. I guess I'm going to do a clean install as a last resort.

Thanks for the screenshots. I tried both indexes and get no luck. It still shows the error 1392 The file or directory is corrupted and unreadable. That is strange as everyone seems to succeed with...

So you mean the description is misleading? As index 1 is showing Windows Pro Technical Preview and index 2 shows Windows Technical Preview

I still have the same error with DISM cannot read the file even though I use the Wim from Tech Bench. Any idea?

There are two indexes in the ISO. One is labelled Windows 10 Pro technical preview....