Hi guys. I am having the exactly same issue as you. In cold post, the k95 is not recognized, the computer boots very slowly and I have to unplug and plug it again to get it work. And this started after the last FW update.
I am on a ASROCK z68 extreme4, completed updated. Before the last FW, I had no problem.
And I only get the k95 to work on warm boots if I let the "usb legacy support" enabled on bios. On cold boots, I have to wait for Windows 7 Ult to start, it gives me an usb error, I unplug then plug it back, and it works. Kind of annoying thing to be done everytime.
I believe the problem is with the last FW.
And I have tested it using USB3 and USB2 ports. And different ones too. Same issue everytime on cold boot.
It does not matter if I set the back button to Bios mode or normal one.
