How to check how long your PC has been on
This step-by-step tutorial will show you how to check how long your PC has been on in Windows 11.
To find out how long your PC has been running, right-click the Windows start menu button or taskbar, click 'Task Manager', click the 'Performance' tab, and then look at 'Up time' to see how long your PC has been on.
If your PC has been on for a long time and the time seems incorrect, the fast startup feature in Windows 11 could be the cause.