I don't think there is Cortana on windows 8.1 desktops, only phones. My version of win8.1 certainly doesn't have it (thank the gods.) I'm also not sure that Rorr is using a wireless mouse.

I don't like wireless mice, myself. My mouse is suicidal, and is constantly leaping off the mouse pad (because the pad rests precariously on the arm of my chair). The wire is the only thing that stops it from ending up out of my reach. More importantly, the few extra grams of weight from the battery causes me to suffer biceps tendinitis. Earlier this year I was looking for a 3 button mouse that was not wireless, and the only one I could find was a Razor. I bought it -- and it turns out to be just as heavy as a wireless mouse. So it just sits there plugged in, looking cool, and casting off the green glowing Razor icon. Instead, I use a ten year old OEM mouse that came with some desktop or other. No third button, but the thing is light as a feather, has really taken a beating, and can run with just about any windows OS drivers.

I don't understand why the cheapest mice are usually the most reliable, but it certainly seems that way to me. I also don't get why 3 buttons aren't standard on these cheap mice. Oh well.

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PoserPro 2014, PS CS5.5 Ext, Nikon D300. Win 8, i7-4770 @ 3.4 GHz, AMD Radeon 8570, 12 GB RAM.