Re: [Qemu-devel] [PATCH v4 3/5] acpi: pc: add fw_cfg device node to ssdt

[Eduardo Habkost]

On Wed, Oct 14, 2015 at 12:18:10AM +0300, Michael S. Tsirkin wrote:
> On Tue, Oct 13, 2015 at 04:10:03PM -0300, Eduardo Habkost wrote:
> > One of the things that may break if guest-visible bits of the machine
> > change is Windows license activation, but the rules Windows use to
> > trigger reactivation aren't very clear.
> 
> They are easy to find on the internet.

I couldn't find them[1]. If you have a pointer to a clear description of
the rules for all Windows versions, I would love to see it.

[1] All I have found were things like:

  "Do I need to activate Windows after making a hardware change?
  Maybe. [...]"
  
http://windows.microsoft.com/en-us/windows/activating-windows-faq#1TC=windows-7

  "Microsoft is characteristically shy about discussing the details of
  activation. [...]"
  
http://www.zdnet.com/article/microsoft-quietly-rewrites-its-activation-rules-for-windows-10/

  "What triggers the need to reactivate Windows? As intended, each
  hardware component gets a relative weight, and from that WGA determines
  whether your copy of Windows 7 needs reactivation. The weight and the
  number of changes is apparently a guarded secret. If you upgrade too
  much at once, WAT decides that your PC is new, and things can get messy.
  The actual algorithm that Microsoft uses is not disclosed, [...]"
  
http://searchitchannel.techtarget.com/feature/How-Windows-7-hardware-upgrades-affect-licensing


-- 
Eduardo