activation

Hello I need an advice. It's long time what I bought my laptop with official win 8. Now I need to clear and format my HDD again. My question is: Can I install my official copy of windows and activate it again ? I would like to clear my hdd completely. If is it possible, please, where I can find...

I want to buy a Windows 8.1 Licence and upgrade to Windows 10. However from time to time, I need to format my PC and do a clean install (or I may just buy another PC). What I want to know is, If I do this, Will I be able to reinstall Windows 10 and use the 8.1 Licence? Or Will I then have to buy...

Yesterday I have upgraded my Windows 7 SP1 to Windows 10 using Get Windows 10 App. After a while I found out that it can't activate it, it says error code: 0xC004C003 I've no idea why I can't activate my Windows 10. So I went back to Windows 7, and I want to install Windows 10 again as soon as I...

During the 2009-2010 school year, I purchased Windows 7 Pro through school. I used it for a while, but uninstalled it when I upgraded that system and put Linux on it. So now I have a windows 7 key and license floating in limbo. Not installed on any device. And I lost the key ages ago. Now that...