PC Uptime
That 11-day uptime is a classic Windows "gotcha." Even if you have physically clicked "Shut Down" recently, Windows has a feature enabled by default that prevents a true kernel reset.
What is that reading?
The uptime reading is determined by the System Boot Time recorded in the BIOS/UEFI and tracked by the Windows Kernel. It calculates the difference between the current time and the moment the kernel was last initialized.
How is 11 days possible if you restarted?
The culprit is a feature called Fast Startup (introduced in Windows 10 and present in 11/Server).
- The "Fake" Shut Down: When you click "Shut Down," Windows saves the state of the OS kernel and loaded drivers to a file on your disk (hiberfil.sys) and then powers off.
- The "Hibernated" Kernel: When you turn the PC back on, Windows loads that saved kernel state back into RAM instead of starting from scratch. Because the kernel never truly "died," the uptime clock keeps ticking.
- Why Restarts are Different: In most Windows configurations, clicking Restart actually performs a full initialization and clears the uptime, whereas Shut Down does not.
Why your reading is so high:
- Fast Startup is Enabled: Your system is hibernating the kernel during shutdowns to make booting faster.
- Lack of "Hard" Restarts: If you've been using "Shut Down" or "Sleep" for the last 11 days rather than the specific "Restart" button, the counter hasn't reset.
How to get a "True" Uptime Reset
If you want to ensure your system is actually starting fresh (which is often necessary for driver updates or fixing "glitchy" behavior), you have two options:
- Use "Restart" specifically: This bypasses Fast Startup and forces a zero-second clock reset.
- Disable Fast Startup: * Go to Control Panel > Hardware and Sound > Power Options.
- Click "Choose what the power buttons do."
- Click "Change settings that are currently unavailable."
- Uncheck "Turn on fast startup (recommended)."