Windows 10: lost the activation key after clean instal

i got a free update from windows 7 to 10 and now i made a clean instal becaus i had boot problems and lost the activation key

:)

 

Clean Install Workaround for Vista

You may remember this news story on techPowerUp! a couple of days ago relating to the lack of clean installs when using the Upgrade Editions of Vista, which required an old OS to be installed. However, Paul Thurrott has managed to find a workaround for this issue, which ironically lets users do a clean install Vista without any previous version of Windows, albeit a little tedious. Here are the steps:

• Boot from the Windows Vista Upgrade DVD as normal
• When prompted for a product code, leave this blank
• Select the version of Vista you have purchased and let Vista install
• When you boot to your desktop for the first time, run the Vista setup from Windows
• This time enter your product key
• When asked whether you want to do an Upgrade of Custom install, select custom and choose a clean install
• Windows will now install for a second time and you should be able to activate it

Remember, these steps are only advised for use in order to achieve a clean install of Vista, it is only legal to use the upgrade editions if you have previously purchased the appropriate version of Windows.

Source: DailyTech

 

Key lost after clean install, how to activate?

Hello!

I had a working and activated version of Windows 10 on my PC. I performed a clean install and also had to empty the drive where my OS was located. I read everywhere that I don't need a new key and that after the installation my Windows would activate automatically
using the old key, but it did not. What can I do to solve the problem?

Thanks in advance and sorry for my rusty English.

Original Title: Key lost after clean install

 

Important W10 activation key questions left unanswered by Microsoft

Not only that, you can check your M$ account and see what devices are listed there, so you know if you can do a clean install or not. Do the upgrade, get it activated, verify that it is listed in your account, then feel free to do a fresh install without activation issues ever.