There could be several reasons why your Windows laptop keeps disconnecting from the Wi-Fi network. Here are some possible causes:

1. **Weak Signal**: If your laptop is too far from the router, the Wi-Fi signal may not be strong enough, causing disconnections.

2. **Interference**: Other electronic devices or networks can interfere with your Wi-Fi signal. This includes devices like microwaves, cordless phones, and neighbouring Wi-Fi networks.

3. **Outdated Network Drivers**: If your network drivers are outdated or corrupted, this can cause issues with your connection.

4. **Power Management Settings**: Your laptop might be set to turn off the Wi-Fi adapter to save power.

5. **Router/Modem Issues**: The problem could be with your router or modem, not your laptop.

6. **Software or Operating System Issues**: Sometimes, antivirus software or certain settings in your operating system can cause connection problems.

7. **ISP Issues**: There might be a problem with your Internet Service Provider (ISP). They could be experiencing outages or other issues.

To resolve the issue, you can try some of the following solutions:

1. **Move Closer to the Router**: If the signal is weak, try moving closer to the router to see if the connection improves.

2. **Reduce Interference**: Move other electronic devices away from your router, or change the Wi-Fi channel on your router to reduce interference.

3. **Update Network Drivers**: Check the manufacturer's website for the latest drivers for your network adapter and install them.

4. **Adjust Power Management Settings**: Go to the Power Management tab of your Wi-Fi adapter's properties and uncheck the box that allows the computer to turn off the device to save power.

5. **Restart/Reset Router or Modem**: Turn off your router or modem for a few minutes, then turn it back on. If this doesn't work, you might need to reset it to factory settings (note: this will erase your current settings).

6. **Check Antivirus Software**: Ensure your antivirus software is not blocking your Wi-Fi connection. You might need to add an exception for it.

7. **Contact Your ISP**: If none of the above solutions work, contact your ISP to see if they are experiencing issues or if they can help troubleshoot the problem.