"I already restarted it": check the real uptime before you troubleshoot

One of the most common lines on a help desk call is "I already restarted it." Sometimes that's true. Often the PC hasn't fully restarted in days or weeks. Before you spend time on deeper troubleshooting, take ten seconds to check the real uptime.

Why "I shut it down" isn't always a restart

Windows 10 and 11 have a feature called Fast Startup, which is on by default on many PCs. When it's on, Shut down saves the Windows kernel session to disk (similar to hibernation) so the next boot is faster. That means drivers, the kernel, and some stuck states can survive a shutdown.

Restart is different. It always does a full reboot and reloads everything. So a user can shut down every night and still have an uptime of two weeks.

Step 1: Check uptime in Task Manager

1. Press Ctrl + Shift + Esc to open Task Manager.
2. Go to the Performance tab and select CPU.
3. Look at Up time (shown as days:hours:minutes:seconds).

If it shows several days, the machine hasn't had a full restart recently.

Step 2: Or check from the command line

From PowerShell:

(Get-Date) - (Get-CimInstance Win32_OperatingSystem).LastBootUpTime

This returns how long it's been since the last boot.

From Command Prompt:

systeminfo | find "System Boot Time"

This shows the date and time of the last boot.

Step 3: Do a real restart

Ask the user to go to Start → Power → Restart, not Shut down. If you're working on the machine yourself, you can also run this from an elevated prompt:

shutdown /r /t 0

Make sure the user has saved their work first.

Step 4: Retest

After the restart, have the user try the exact thing that was failing. A fresh boot clears out stuck processes, finishes pending Windows updates, reloads drivers, and refreshes network settings. Plenty of "slow PC," "Teams won't load," and "printer disappeared" tickets end right here.

If the problem is still there after a confirmed restart, you've ruled out a whole class of causes and can troubleshoot with confidence.

Takeaway

Don't just ask "did you restart it?" Check the uptime. It's fast, it's polite (no one feels accused), and it tells you whether a real restart actually happened. Then move on to the next step only once you know the basics are covered.