Windows 10: Cannot reactivate windows 10 after hard reset

Hi,I have just hard reseted my system by using "Reset this PC" button in "Recovery" options. The problem is that I wanted to remove all files because I had some problems with system and I hoped that completely cleaning it will help and after reseting and reinstalling windows it says that my windows 10 is not activated and it says that "we cant activate windows on this device because you dont have a valid digital license or product key". I have stored my key before reseting but even if I write it there it says "the last product key you entered cant be used on this copy of windows". I'm confus

:)

 

Windows 10 Tweaks

Pressing “Windows+Pause Break” (it’s up there next to scroll lock) opens the “System” Window.

Windows 10: In the new version of Windows, Explorer has a section called Quick Access. This includes your frequent folders and recent files. Explorer defaults to opening this page when you open a new window. If you’d rather open the usual This PC, with links to your drives and library folders, follow these steps:

• Open a new Explorer window.
• Click View in the ribbon.
• Click Options.
• Under General, next to “Open File Explorer to:” choose “This PC.”
• Click OK

credit to Lifehacker.

 

Contest! Win Hard Reset!

Bump

No one wants Hard Reset? I'm open to other suggestions for contest ideas.

maybe i got this in the wrong section... could a mod move it to the FS/FT/WTB/Giveaway section?

 

Supported phones for Windows 10 Mobile Insider Preview Mobile

Your list confirms my phone is eligible, Lumia 521. The windows Insider App fails after ~ 15 seconds, restores data and gives me error 80073cf9. I trouble shot this and went thru all the steps mentioned on several websites including MS without any luck. Short of a hard reset, this is where I am now. Suggestions appreciated.