Dear Pravin Nath,
If you want to install a driver, first you need to check for any missing drivers by opening the Device Manager. Then, go to your browser and search for your laptop model. Do not download any other application. Instead, enter your laptop's make and model on the Acer website to download the appropriate driver. Once downloaded, install it and your laptop will automatically restart. Additionally, you can identify any missing drivers through the Device Manager and download/install them accordingly. I hope this helps!