Win8 reinstall: product key not accepted

[arj0n]

So I bought and installed the upgrade version of win8 (which is the "Downloadable Pro for $39.99 ERP") on my win7pro machine.
After (or during) the install I created the win8 image file.

I now need to reinstall it so I booted this image (from dvd)
It collects info (step 1) and during step 2 it asks for the product key.
The problem: it won't accept my product key!
Did I made any typo's: no.

Did anyone had this same issue or does someone know what to do now?

I didn't try the next 2 options because now I still have win8 running and option 2 might result in not getting win8 installed at all...:
1. download the win8 manager from the official site and run it
2. reinstall win7pro and download the win8 manager from the official site and run it

??

[bicilotti]

I don't use MS Win, but is there a way to contact a customer service?
You have a license/receipt and all so they should be quite prompt in helping.
Keep us informed!

[Anian]

There's seems to be a mention of Updating Win7 before you Upgrade to Win8:
http://www.gigabyte.com/WebPage/104/step-upgrade.html
http://howto.cnet.com/8301-11310_39-57479377-285/how-to-prepare-your-pc-for-windows-8/
Did you do all that?

[arj0n]

@Bici:
Yes, I know. But that will be my last option.
I hope there are more ways to fix this...

@Anian:
Yep, did these step. My win7 was completely updated.

---
I'm first gonna download and run the win8 installation manager again in stead of booting from the iso created by ther win8 installer...
Looks like that iso is more a recovery disc then a complete clean installation disc.

[amateurhour]

I know you said it's a last resort, but just call customer service. I had to do that and waited as a last resort a few months back and it was literally a 20 minute call. They logged into my system to make sure everything was legit and gave me a new key on the spot, not just entered it in, but gave it to me as a text file.

It was faster than the three hours of google searches I had done previously to try and fix the issue.     

[arj0n]

Well, I've re-installed Win7Pro and removed my partition to get a clean install.
Then I downloaded and run the Win8-Manager again.
I filled in the product key and it was accepted.