I use the laptop's factory recovery media and if the hardware is good the machine works.
There are so many web pages about W10 upgrading that I'm going to share how I get a machine working again and pause until you have the machine back to factory condition.
So when my girlfriend's computer tried to update from windows 7 to win10, it nothing works at the choose language screen. I looked it up and found that it was a driver issue and that if you get a usb with win10 on it you can fix it (the same thing as if you are reinstalling an os). I did that and tried doing what the thing online said but it didnt work. but, there is also an option for me to just install win10 like you would when first installing an os but the problem is, idk what their product key is and my normal method of getting a product key is unusable in this situation (since they cant get to their home screen). Do you know if installing win10 like you would installing an os normally would give them an unactivated version of windows or would it update the product key automatically? and if it wont, do you know of a way to get the old product key (maybe via the command prompt or something like that)?

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