How do I "unactivate" Windows 8 Pro?

Uninstalling product key should work:

Code:

cscript slmgr.vbs /upk

 

perhaps there is "helper" one day

 

EDIT: some addings

 

delete tokens.dat and data.dat in system32\spp\store folder
this should do the job.
maybe not for kms but for retail and mak.

but i guss josh knows how to do it best.

 

Not that easy to delete them manually . But the /rearm command should do this instead (afaik it does exactly this).
Tested in Enterprise and reinstalling the key does not reactivate the system then.

 

hehe. ok than.
"net stop sppsvc" first

 

At final, which commands should I use?

 

Tried my self with:

Code:

cscript slmgr.vbs /upk 
then 
cscript slmgr.vbs /rearm

Then reboot system. Did this in Win 8 Pro and reinstalling the keys afterwards, for testing, didn´t restore the activation, so give it a try.