HP 15 Laptop - Intel Core i5 - 8 GB RAM - 512 GB SSD - Full HD - Black

Go to Settings > Windows Update and check for updates. Install any available updates and restart your laptop if prompted.

Connect the monitor to the laptop using an HDMI cable. The laptop should automatically detect the monitor. You can adjust display settings in Windows settings.

Reduce screen brightness, close unnecessary applications, disable Bluetooth when not in use, and enable battery saver mode.

Go to Settings > System > Recovery. Under 'Reset this PC', click 'Reset PC' and follow the prompts. Note that this will erase all your data. Make a backup before doing this.

The HP 15 Laptop typically comes with a one-year limited warranty. Check your product documentation for specific details.

Yes, depending on the model, you may be able to upgrade the RAM. Consult the HP documentation or a technician.

Use a soft, lint-free cloth, slightly dampened with water, to clean the screen. For the keyboard, use compressed air to remove debris. Avoid harsh chemicals or excessive moisture.

Check the power adapter and outlet. Ensure the power cable is securely connected to both the laptop and the wall. Try a different outlet.

Ensure Wi-Fi is enabled in the settings. Check your router and internet connection. Restart your laptop and router.

Close unnecessary applications. Run a virus scan. Check for Windows updates. Consider increasing the amount of RAM if you are using many memory intensive programs.

Adjust screen brightness. Update display drivers. If the problem persists, contact HP support.