Windows 10: Moved Licensed Windows8.1/Windows10 VMWare vm to Virtualbox. Needs activation now?

Hello,
I have a licensed copy of windows 8.1 that I installed as a vmware virtual machine and performed a free upgrade to windows 10. Been working fine until I had a problem that requires moving to Virtualbox. The VM works fine under Virtualbox now but says I need to activate it again. Any fixes?

:)

 

Running your Browser in a VM?

• Install VMware Player or Virtualbox, VMware being faster in my experience
  
• Create a VM with sufficent RAM HD and all CPU cores
  
• Install Ubuntu/Linux Mint/Debian or some lightweight distro with Xcfe or LXDE
• Install VMware/Virtualbox tools
  
• Almost any distro comes with Firefox
• Install Ublock Origin/Noscript/Ghostery
• Disable cookies with a whitelist/use private browsing.

In my experience, running a browser through a VM can slow down scrolling smoothness, video playback and increase ping delay

 

Activation and Re-activation of Windows 10 Pro VM (VirtualBox, OSX Host) not working

I've moved a working and activated Windows 10 Pro VM (VirtualBox) from a Windows 10 Host to an OSX Host. The re-activation of the is not Working (Error Code 0xC004C003). I also moved a Windows 7 Pro VM that reactivate without problems. I tried everything
mentioned in the process to activate. Nothing works or even outputs some useful hint or support contact.

• used another (afaik unused) product key. not working! Same Error Code.
• created a new VM and installed a fresh Windows 10 pro. The new machine can not be activated!

Thus this seems to be a problem within the crappy M$ activation system.

Any useful hint how to activate this M$ crap would be highly appreciated.

 

VirtualBox VM activation of Preview build 17763.104

I had issues with my Linux Mint 18.3 host using a VirtualBox VM of Windows 10 pro preview build, so I followed the procedure to "export" The Windows 10 VM and also saved the original VM intact in a separate folder on my data drive. After a clean install
of Linux Mint 19 and installing the latest version of VirtualBox available in the repos I then imported the VM of Windows 10 that I had previously exported. This went smoothly enough, but the Windows 10 (Build 17763.104) now says it is not activated - whereas
it has previously been activated for years through successive preview builds and even different versions of Linux Mint and VirtualBox versions (I don't recall ever having to activate it). I thought maybe the "export" of the VM was the issue, so copied back
the ORIGINAL and UNCHANGED Windows 10 VM folder and opened that in VirtualBox. Now even that original Windows 10 Pro Preview build is no longer activated despite NO CHANGES to the VM itself from the previous hour before I reinstalled Linux Mint and VirtualBox.

How do I activate this? I have never had to before and have used this VM for years with every Insider preview update sent out.