The workaround I was referring to was to set the clock back on the local machine only during the short time window of the licensing verification stage of the boot process. The time can then be set back to normal time before the VM even gets far enough along to notice that it was set in the past. ESX won't stop any machines that are running, it only affects boot and reboot procedures. And as far as the Microsoft product, I wasn't being snarky, competition will only make VMware challenge themselves to be better and cheaper. If they serve your needs better by all means switch. It's not really a solution I think many of us will take, and threatening to take your ball and go home isn't really helpful in expediting a fix. I just think you are being unrealistic about the timeframes for a patch of this magnitude, and frankly wonder why you think Microsoft would be any faster, despite their extensive experience in patching show-stopper bugs. (Okay, that was snark.)