Have you ever noticed that your laptop's clock is running behind the actual time? You're not alone. This common issue can be frustrating, especially when it comes to scheduling meetings or catching flights. Let's dive into the reasons behind this phenomenon and explore how to fix it.
Why Does Your Laptop Clock Lose Time?
The most common reason why your laptop clock might be behind is due to the lack of a real-time clock (RTC) battery. Modern laptops often rely on the system's main battery to keep the clock running when the laptop is off. If your laptop is unplugged and turned off, the clock will stop and start losing time.
Other Possible Causes
- Incorrect Date and Time Settings: Your laptop's clock might be set incorrectly from the start. This could be due to a misconfiguration during setup or a power outage that reset the clock.
- Power Saving Settings: Some laptops have power-saving features that can put the clock into a low-power mode, causing it to run slow and eventually lose time.
- Hardware Issues: In rare cases, the issue might be due to a hardware problem with the laptop's clock or battery.
How to Fix a Laptop Clock That's Running Behind
Check and Adjust the Date and Time Settings
First, let's ensure that your laptop's date and time settings are correct.

- Press the Windows key + I to open Settings.
- Click on Time & Language.
- Under 'Date & time,' turn off 'Set time automatically.'
- Manually set the correct date and time, then click 'Change.'
- Restart your laptop.
Check the Power Settings
Next, let's ensure that your laptop's power settings aren't causing the clock to run slow.
- Right-click on the Start button and select Power Options.
- Click on 'Choose what the power button does.'
- Click on 'Change settings that are currently unavailable' if the options are grayed out.
- Uncheck the box for 'Turn on fast startup (recommended).'
- Click 'Save changes.'
Check the Battery
If your laptop is running on battery power, ensure that the battery is healthy and fully charged. You can check the battery's health in the Power Options menu.
Update the BIOS/UEFI
Outdated BIOS/UEFI firmware can sometimes cause clock issues. Check your laptop manufacturer's website for any available updates.

Preventing the Laptop Clock from Losing Time
To prevent your laptop's clock from losing time in the future, consider the following tips:
- Keep your laptop plugged in when possible.
- Enable 'Set time automatically' in the Date & time settings.
- Regularly update your laptop's BIOS/UEFI firmware.
- If you're using a laptop with a removable battery, consider using a battery that has a built-in RTC.
In most cases, adjusting the date and time settings and checking the power settings should resolve the issue. However, if the problem persists, it might be a good idea to consult a professional technician.