You can't disable it, completely. It's  not possible to disable cortana completely.,(reply>), @slabs 37 i did the registry and alll. On the one machine i have with win 10. But it can not be deleted or removed completely. It will forever sit on you hdd, waiting and plotting. It still pops up every few months in the active process list for a few seconds. Then the process closes itself. I've even seen it atart up and try to search for something I've searched before, well after i "disabled it" and full telemetry block. Ive just taken that machine offline. As it is an intel compute stick i can't put win 7 on.,(reply>), Do you know about the registry way?