Is there any tool around to backup online activation for Windows 10 as is the case with Windows 8.1? Any help would be appreciated!
There is no need for any tool. Once you upgrade your computer to Windows 10, your system is registered with Microsoft's servers. You can clean install as you like. I have not heard of any limit on the amount of times, but you never know.
what I have done is after fresh install (and activated) I have taken backup with Acronis Backup & Restore.
There are. You can try: 1. MSActBackUp Portable by Ratiborus 2. OPA-Backup 3.4.2 3. Microsoft Toolkit 2.5.3 4. Windows 9 Product Key Viewer
there is discussion thread about activation restoration for win 10 http: // forums.mydigitallife.net/threads/62907-DISCUSSION-Offline-activation-restoration-for-win10, but at the moment nobody know how to backup online activation.