Hey Daunful,
It looks like the Nvidia driver is out of date. First, remove the old driver files by using the third party driver remover DDU. You can find a guide on using this program here. After this, pick up the latest driver from here.
Next, change the Nvidia settings:
• Right click on the desktop and launch NVIDIA Control Panel → Manage 3D settings.
• Go to Program Settings tab.
• Select the game to change the graphics processor under “Select a program to customize”. If it’s not is not available, select the specific game from the drop down list.
• Select your “Prefer maximum performance” graphics card under “Power management”.
Then reset the Overwatch settings to set everything back to default.