You can fix your clock by forcing a manual update in the Date & Time settings or by restarting the Windows Time service. When you notice time not syncing on windows 11, it’s usually because the background service responsible for checking the internet time servers has stopped or a firewall is blocking the connection. If you have just updated your system or changed your region, the settings might be stuck in a conflict between your local hardware clock and the server time.
Reasons your windows time isn’t syncing
The clock on your computer relies on two things: your motherboard’s battery and a synchronization service. If the small battery on your motherboard is failing, the hardware clock will lose time every time you turn the computer off. This happens because the motherboard can’t keep the internal timer running without power. You’ll know this is the cause if your clock is always slow by exactly the amount of time the computer was turned off.
Another common cause is a conflict with the Windows Time service. This background process contacts an external server to verify the current time. If this service is disabled or set to start manually rather than automatically, your computer will stop asking the internet for the correct time.
Finally, network settings or security software can block the connection. Windows uses the Network Time Protocol (NTP) to sync, which requires specific ports to be open. If you’re on a restricted network or using a strict firewall, the request to the time server will fail. This varies by model — check the label on your motherboard manual if you suspect the internal battery is dead, as replacing it requires opening the case and potentially voiding your warranty.
Force a manual sync
If you need the time corrected immediately, use the built-in sync button. This is the best first step because it doesn’t require administrative commands or deep system changes. Open the Settings app by pressing the Windows key and “I” at the same time. Navigate to “Time & language” and then select “Date & time.” Look for the section labeled “Additional settings” and click the button that says “Sync now.”
This action forces your computer to reach out to the default time server immediately. If the button is greyed out, your computer is likely already trying to sync or the service is unresponsive. If it remains disabled, restart the “Windows Time” service via the Services console.
If you see a red error message, the server failed to respond. This often happens if your firewall blocks NTP traffic on port 123. If the time updates correctly, you’re done.
If it still shows the wrong time, verify that your “Time zone” setting is correct for your location. If you live in a region that observes daylight saving time, ensure the “Adjust for daylight saving time automatically” toggle is turned on. If you’re in a country that doesn’t follow these rules, this toggle must remain off to prevent the clock from jumping forward an hour unexpectedly. If the clock remains off by exactly one hour, you have likely selected the wrong time zone offset, regardless of the daylight saving setting.
Restart the time service
When the manual sync button fails, you must restart the engine that runs the process. This is the primary fix when the background service hangs in a loop. Press the Windows key + R, type “services.msc,” and hit Enter. Scroll down the list until you find “Windows Time.” Right-click it and select “Restart.” If the “Start” option is available instead, click it to initialize the service.
After restarting, right-click “Windows Time” again and select “Properties.” Change the “Startup type” to “Automatic.” This ensures the service launches during every boot cycle. If the service is running but the time remains incorrect, restart the service. This pause clears temporary cache errors that block communication with time servers.
You must be logged in with an administrator account to modify these settings. If the “Restart” option is grayed out, your current user profile lacks the necessary elevated privileges.
A common mistake is assuming the service is the culprit when the issue is actually a blocked UDP port. If restarting the service fails twice, check your firewall settings to ensure port 123 is open for outbound traffic. If you’re uncomfortable modifying system services, reboot your computer first. A full system restart forces the Windows Time service to re-initialize its connection handshake. If the time remains off by more than a few minutes after these steps, your CMOS battery on the motherboard may be failing, which requires physical hardware replacement rather than a software fix.
Update your time server
Sometimes the default server provided by Microsoft is busy or blocked by your internet service provider. You can switch to a different, reliable server to see if that solves the sync error. Press the Windows key, type “Control Panel,” and open it. Go to “Clock and Region” then click “Date and Time.” Select the “Internet Time” tab and click “Change settings.”
You’ll see a box labeled “Server.” By default, it’s set to “time.windows.com.” You can replace this with a different server address. Many users switch to the official time servers provided by the NTP Pool Project, which are globally distributed and highly reliable. Type “pool.ntp.org” into the server box and click “Update now.” If the sync succeeds, you’ll see a message confirming the time was successfully synchronized. This is worth the effort if you move between different networks often, as some public Wi-Fi networks block the default Microsoft server to prevent traffic congestion. If this still doesn’t work, check your router’s firewall settings, as some strict configurations block all NTP traffic by default. If you aren’t a network administrator, you may need to contact your ISP to see if they restrict outbound NTP traffic.
What not to do
Don’t disable the Windows Time service entirely. Doing this stops all automatic syncs, meaning your clock will drift significantly over time. If your system clock drifts by more than five minutes, many secure websites will block your connection, triggering constant SSL certificate errors.
Don’t set the time manually if you can avoid it. Manual entry is a temporary fix; the system will eventually drift again because it lacks a reference point. If you must set it manually, use it only as a diagnostic step to see if the hardware clock is failing.
Don’t install third-party “atomic clock” software. These programs often run unnecessary background processes that consume system memory and can conflict with built-in settings. If your time is consistently wrong, the culprit is usually a dead CMOS battery rather than a software deficiency.
Don’t change the BIOS clock unless you’re experienced. Changing hardware settings can prevent the computer from booting if you select the wrong date or time configuration. Always prioritize OS-level adjustments first.
How to stop it happening again
Consistency is the best way to keep your system clock accurate. If you use your computer for work or gaming, ensure your settings are locked to a network server rather than your local hardware.
| If you’re doing this | Do this instead | Why |
|---|---|---|
| Leaving the PC off for weeks | Turn it on once a week | Allows the OS to verify time |
| Using a custom firewall | Allow NTP port 123 | Permits server communication |
| Traveling between zones | Set to “Set time zone automatically” | Updates location data via GPS/IP |
Most users mistakenly rely on the motherboard’s CMOS battery to maintain time during power cycles.
The decision rule is simple: if your drift occurs while the machine is off, replace the hardware battery. If the drift occurs while the machine is running, you have a software synchronization conflict. Ignoring this leads to corrupted file timestamps and rejected security certificates during web browsing.
Frequently asked questions
Can I fix this without restarting?
Yes, you can often fix sync issues by clicking the “Sync now” button in the Date & Time settings or by restarting the Windows Time service in the Services console. These actions refresh the connection to the time server without requiring a full system reboot. If these don’t work, manually changing the server address to a public pool can often trigger an immediate update.
Why does my clock change when I play games?
No, the game itself usually doesn’t change your clock, but some anti-cheat software can conflict with time synchronization services if your system clock is significantly out of sync. When your clock is incorrect, security certificates for online services fail to validate, which can kick you out of games or prevent them from launching.
Is it safe to change my time server?
Yes, it’s perfectly safe to change your time server to a known public address like the NTP pool. These servers are standard, free, and used by millions of devices worldwide to keep clocks accurate. They don’t track your activity or compromise your security; they simply provide a reference signal for your system to verify the current time.
How long does a sync take?
It takes about five to ten seconds for your computer to reach out to the server and receive a response. If the process takes longer than thirty seconds, it usually means the connection is being blocked by a firewall or the server is temporarily overloaded. You should see a confirmation message immediately after the sync completes.
What happens if I ignore the error?
If you ignore the error, your system clock will drift, which causes “Time is out of sync” errors on websites and prevents encrypted apps from working. Most modern websites use security certificates that rely on the exact time; if your clock is off by more than a few minutes, your browser will block you from visiting secure websites.
Final Thoughts
If your clock still drifts after these adjustments, it’s worth checking your motherboard’s CMOS battery. If that small component is failing, it won’t hold your settings when the computer is off. Replacing it’s a simple, inexpensive fix that’ll keep your system running accurately for years to come.
