Computer Updates and Restarts (Reboots)
Most months your computer finishes its updates with one restart. Some months it asks again. That second prompt is not a glitch and it is not “stuck.” Windows is finishing the next layer of work, and it cannot do that until the first restart is complete.
Why one restart is not always enough
Windows does not install “one big update.” A monthly cycle is usually a stack of smaller pieces that have to go on in order.
- Some updates prepare the installer. Microsoft often ships a servicing-stack update first. That is the tool Windows uses to install everything else. It has to finish (and sometimes reboot) before the main security rollup can even start.
- Some files are in use while you work. Kernel, driver, and core Windows files cannot be swapped out while they are running. A restart is the moment Windows replaces those files.
- The next coat needs a dry first coat. After the first restart, Windows continues “configuring updates.” It may then install .NET, another security package, or a leftover component that was waiting on that first swap. Those can require a second restart.
- That is expected, not a failure. Two (occasionally three) planned restarts in one patching cycle is normal Windows behavior. It means the updates are applying in the safe order, not that something is broken.
Think of it like painting a room. The primer has to dry before the next coat. Restarting once lets the first coat finish. Restarting again lets the next coat go on. Skipping the second restart leaves the job half-done — and half-applied security updates are the ones we are trying to avoid.
When we schedule the restarts
We do not leave Windows to reboot whenever it feels like it.
- Planned system restarts begin on the 25th of every month, regardless of the day of the week.
- Critical security fixes can still land sooner when Microsoft ships something urgent — that is covered in Windows updates on managed computers.
- If your computer is off or offline during that window, nothing is missed forever. When it comes back, updates finish installing and then you will be prompted to restart.
The 25th is the start of the window, not a promise that every machine reboots at 9:00 a.m. that morning. A laptop that was closed in a bag, or a desktop that was powered off, catches up the next time it is on and connected.
What the prompt looks like
You will be alerted by a system dialog on your screen — not an email, and not a browser pop-up. The window is titled System Notification.
Typical wording:
- Heading: Reboot required for system updates
- Body: In order to apply security patches and system updates, your computer must be restarted. Please save all work, close all applications and select 'Yes' to restart your computer.
- Buttons: Remind me later or Restart now
The message may say select Yes — the button to click is Restart now.
What happens if you click Remind me later
You can postpone briefly while you finish and save what you are doing. The reminder is not unlimited.
| Setting | What you will see |
|---|---|
| How often it asks again | About every 2 hours until you restart |
| How many reminders | Up to 3 prompts. The dialog may show remaining attempts. |
| If you keep postponing | The last prompt stays on screen for about 5 minutes, then the computer restarts so updates can finish |
If nobody is signed in, the computer restarts on its own. That is why an overnight or unlocked-at-login restart around the 25th is usually just maintenance.
If it asks you to restart again
After the first restart, Windows may still have work to do. You might see:
- “Working on updates” or “Configuring Windows” on a blue or black setup screen
- The same System Notification dialog a little later
- A second “Restart now” after you have already rebooted once today
Restart again. The second restart is how the next layer of updates gets to finish. Closing the window or ignoring it delays security patches and can leave the computer in a half-updated state until the next forced prompt.
Two (occasionally three) restarts in the same update cycle, with this same dialog, are expected. That is not the same as a computer that keeps restarting for days, or restarts with no prompt at all.
What you do not need to do
- Do not click Check for updates in Windows Settings to “hurry it along.” That can pull patches we have not finished testing. See Windows updates on managed computers.
- Do not download a “reboot fixer” or extra update tool from the web.
- Do not assume two restarts mean ransomware or a crash. Look at the prompt. If it is the System Notification restart dialog, it is maintenance.
When to contact us
Tell us if:
- The computer restarts while you are actively working with no chance to save
- It keeps restarting days later, or without the System Notification “Reboot required” dialog, after this month’s updates should already be done
- You see a full-screen crash / stop code instead of this dialog
- The machine never comes back to the sign-in screen
Submit a support request · [email protected]
Related articles
- Windows updates on managed computers — why “Last checked” looks old, and the 25th schedule
- Why did my computer restart? — scheduled vs crash vs power vs heat
- Rebooting / restarting your computer — Restart, not Shut down
- Recovering a deleted file or an earlier version — if a restart cost you an unsaved file
Need help? [email protected] · Submit a support request