1 Basic configuration
Click Start > Settings > Cortana to configure your mic, set permissions (and delete history), configure web search settings and manage notifications between all your devices running Cortana. To clear everything, select ‘Change what Cortana knows about me in the cloud’, scroll down and click Clear.
Manage services 2
Open Cortana and click the Notebook icon on the left to configure Cortana’s functionality as a personal assistant. Most options involve choosing the kind of information that you want to know about; click Connected Services to link supported providers such as Gmail, Office 365 and Wunderlist.
Disable Cortana 3 completely
Press [Win] + [R], type ‘regedit’ and press [Enter]. Browse to HKEY_LOCAL_ MACHINE\SOFTWARE\Policies\Microsoft\ Windows\Windows Search. Choose Edit > New DWORD (32-bit) Value. Name it ‘AllowCortana’ and double-click it to set its value to ‘0’. Now reboot your PC.