How do I stop Windows 10 from locking after inactivity?

Hit Windows Key + R and type: secpol. msc and click OK or hit Enter to launch it. Open Local Policies > Security Options and then scroll down and double-click “Interactive Logon: Machine inactivity limit” from the list. Enter the amount of time you want Windows 10 to shut down after no activity on the machine.

How do I stop the computer from locking when idle?

Click Start>Settings>System>Power and Sleep and on the right side panel, change the value to “Never” for Screen and Sleep.