Windows 10: How do I activate Windows when the new keys that I buy don't work

So, I've never had to update windows, but I've bought 2 or 3 keys and none have worked, it hasn't been over 90 days and it just refuses to work

:)

 

Windows 7 OEM license don´t work

Dear community,

last week I bought a new notebook (asus gl752vw). I also bought an windows 7 pro 64 bite oem license. I installed the operating system windows 7 pro on my new notebook, but there was a problem, that the notebook drivers only work with windows 10 64 bit (****.
I dont know why) I couldn´t even connect to the internet. I thought maybe first I should activate my license. I called the windows hotline and followed the steps. The 9 codes under the phone number of windows worked fine, so I got my activationcode from windows
per phone. Now the problem was that i missed one letter or number from the activation id, so it said not more compatibIe. So my windows 7 oem license wasnt activated at all. After that I thought it would be better when I install windows 10. After the installation
of windows 10 64 bit the notebook worked fine and all was possible. The only missing point is, when I wanna activate my license Windows say: "This product key is running on another pc. Please try it with a different key. Error: 0x803FA071.

So when I wanna activate the license now per phone the 9 codes under the number aren´t verificated (that´s what the windows support voice said). Do you know how I can fix the problem or so? I don´t wanna buy a new license if it´s possible.

(sorry for mistakes, cause I´m german).

 

stuff that don`t work

Nice, no answers what so ever... still can`t open new notifications, still right-click don`t work on taskbar... and still no answer as to why

 

Windows activate key problem.

My computer wants me to put in the windows key again but the thing is I don t have it. The last owner of my computer left the windows in and I don t think he will give me the key. But I do have a new key, will it work if I put in a new key and not the
old one or do I have to completely reset my computer? Really don t want to reset my computer I don t have big enough flash to back everything up. Is there any way I can activate my new key without resetting my computer?