The other issue here is what MS does regarding Windows 7. It would not surprise me in the least if they tried a clever/efficient patch for Windows 10 and a simpler (and slower) bodge-job for Windows 7/8. Still, I guess we'll find out soon enough. They'd also better make sure that the changes only apply to Intel machines. I don't want MS to arbitrarily slow down my AMD PC as a result of this - you'll note that AMD submitted a Linux patch to ensure their CPUs weren't caught up in this, will MS do the same? Afterall, there is a reason this partnership is called "Wintel", both know it's in their best interest not to screw each other over.