Windows 10: Win 10 install on two different drives with same Win key in same computer?

I have a Win 10 computer (legal upgrade from Win 7) that gives me terrible problems booting up, re-starting, or shutting down. I would repair the install but I'd lose all/many of my other programs. So what I want to do is have a fresh Windows 10 bare install on a second hard drive while leaving this problem version where it is and have a pop-up menu asking me to decide which version I want to use when it boots up. Is this possible? How do I get the menu asking me to select a version? Also, since this is a legit version, can I use the same Windows license for the two versions on the same machine? Third, I've read that on a re-install/repair that Windows will verify the license automatically so I won't need a license key (which since it was a free upgrade I don't have.) Is that true? Thanks.

:)

 

Fresh Install of Win 10 without Serial Key?

Looking to reformat a laptops HDD, and then reinstall Win 10 fresh. The problem is it came pre-installed with Win 8 and I did the free upgrade to Win 10. How exactly would I re-format the HDD, reinstall Win 10 and ensure it reactivates properly? I don't see a Win 8 serial key anywhere in the contents of the box.

 

Win 10 clean install question

So I spend the day yesterday installing the computer, using a prepared usb key with windows 10 on it.

I got it all sorted in the end but I'll share my fails anyways so others might learn:

Do not try to do a clean install win with win 10 home N, when you come from a machine with just win 10 home. It won't activate *Wink After reinstalling with the right copy, it was already activated right away after the first boot, didn't even have to initialise it.

There hasn't changed a whole lot in making clean install compared to older versions of windows, it's slightly better streamlined, though being asked at 3 different stages to enter a product key when it's not needed during install seems a bit annoying.

Further more it would be lovely if Microsoft finally learned to ask ALL questions regarding preferences updates and whatnot in one go, so you can then go away from your computer and come back to a fully installed/updated system including reboots.. Not impossible I would say.


There's still some little bugs, like when I installed realtek audio drivers, they'd go into an infinite loop asking for reboot and install the driver. And as a PDF reader isn't in the list of standard programs to select, foxitreader keeps saying it is not the default reader for pdf's even though I had said yes to the question 3x. If this fails to get file associations for PDF's I do hope Microsoft will fix this asap.


Thanks for the fast answers earlier guys, it gave me the confidence that all would be well, even when I cocked up the first install with the N version.

 

Win.10 won't boot after installing Win.7

Hi,

So i installed Win.10 via the UEFI and after installing Win.7 on Legacy Mode onto a different HDD i can't boot into Win.10 (I believe can only because Win.10 was installed via UEFI)

I tried installing the BCD Software but nope. I even tried to select my HDD but say Winload.exe error

Even tried going into the USB and try repairing but the same thing happens