Windows 10: Windows 10 install question

Hi folks, I upgraded to Windows 10 a few days after it was released, and I then performed a clean install, (I like it fresh). My question is, what happens if I need to clean install this OS (because of malware or some such) after July? Will I need to buy it? Also, if I don't need to buy it again where would I download the .exe to get it installed? Should I save it now on a USB to be safe?

:)

 

Windows 10 retail license key

I've been looking into possibly getting Windows 10. I found retail license keys being sold on eBay for extremely cheap (under $15). It
seems like there would have to be some issue with these. However, I'm not sure what the problem could be. I've been doing some research. If I understand correctly, if it's retail then it cannot be OEM. Also, if it's retail, I understand it cannot be
a volume license key. From what I understand, it cannot be MSDN, either. If it were simply pirated, then I don't see how it could be activated as they claim it can be. What am I missing? FWIW, it comes from Europe, but claims to be valid worldwide.

(Not linking to the eBay sale as I don't want to "promote" it if there is an issue with it. But what can you suggest to me based on the little info available?)

Edit: A possibility... could it potentially be resold to other parties and activated by them, but then if I reinstall (when enough activations have been done), I will be unable to reactivate again?

 

Windows 10 installation question

You don't need to do the Upgrade over if it was previously activated. Just do a

Clean Reinstall Windows 10 Upgrade/Factory OEM - Microsoft Community .

 

Once you upgraded to Windows 10 your computer was registered in the data base at MS. You will be able to do a clean install for free for as long as you own that computer.

 

Excellent, cheers!