Updated to windows 8.1 ProWMC, Genuine Key BLOCKED!!

Like $10.00 is going to kill you buy a new key

 

This happened with my upgrade as well, my legit key went invalid after upgrade. Just use phone activation method to reactivate and you'll be fine.

 

You're lying. You did not buy it for one computer and get it blocked after upgrading.
You have either used an internet leaked key or you have used the key on MANY computers.
I base this on the fact that you have no idea how ProWMC keys work.
Anyone who bought the upgrade key knows you have to have a legit pro key.
They also know that the ProWMC upgrade key is only bought online.

 

That clearly shows that either you have used your key on more than one PC or got yourself an internet leaked / pirated key...So please stop wasting others time or post the proof of purchase.

BTW I also am using an upgrade key for ProWMC and it's working on my pc after 2 reactivations. (Because it was used on the same hardware)

 

Well if that's true, then I apologize.
I'm very skeptical by nature, and your arguments against contacting customer service and lack of knowledge about things you purchased in general were alarming.
I'm glad you got it worked out.

For secureboot, go into bios and into boot options.
Go into secureboot section and try to enter some sort of default keys.
If it doesn't work, you might have to re-setup windows by running setup from a Legacy (BIOS-mode) boot setup.

 

Dude that's the box for Windows 8 Pro...I was referring to your ProWMC license...which you still did not post?...

Try first to comprehend what is being asked

Anyway since your problem is solved..So let's just leave it at that

 

Don't be mad at the guy asking for help. I had a related problem with MS activation that could explain what happened to him. I had Windows 8 Pro installed installed and activated since release. I had also requested at the time a free WMC upgrade key that I never used. Then a couple of months ago I boutght a TV tunner and decided to give Media Center a chance and before buying a new WMC key I decided to use the free key I had. MISTAKE. W8Pro accepted the old WMC free key and installed it and after rebooting windows was de-activated. What I tried without succcess
1. Phone activation did not work because the Free Key WMC was blocked (I think it was expired?)
2. Genuine Win8Pro did not work because I now have the OS WMC installed (different version)
3. System restore did not work because WMC installation erased all restore points
4. Calling customer service no luck getting a WMC key to avoid reinstalling everything and you can't buy a WMC key when you already have it installed!

My only solution was reinstalling W8pro (without WMC), activate with my genuine key and then buy a WMC upgrade key ($12)

What is stupid on MS part is allowing me to upgrade with an expired key but later deactivate windows. Upgrade key should be validated with activation servers BEFORE installing WMC.

I tell you this long story because the OP probably had a free expired WMC key installed over his genuine W8Pro and when he upgraded to 8.1 the activation servers did not validate his WMC key. It seams that he was luckier than me and Customer service provided him with a WMC key, for me it was a total reinstall of the OS the only solution.