I am using HP Compaq Presario SG3650IL desktop PC. I am new to Linux so all I want to know that how to download specific drivers for my PC.
Let Ubuntu decide:
In GNOME Classic
In Unity (the default interface)
Open the Dash and search for System Settings.
Open System Settings. In the window that comes up, click on Additional Drivers.
Alternatively, Ubuntu will automatically perform update scans on a regular basis to ensure that every part of the system is kept up to date with fixes for security and stability problems.