Drivers require low-level access to hardware functions in order to operate; drivers typically operate in a highly privileged environment and can cause disaster if they get things wrong. Having no clue about where or how to download the latest drivers for your device? I'd take downloading printer driver of Epson Stylus NX420 for example.
Step 1
1. Click Start, type "cmd" (without the quotations) in the Search Bar and Press "Enter".
2. Type "dxdiag" and Press "Enter".
What you got in the pop-up windows is your system information.
Step 2
1. Log on to http://www.epson.com/cgi-bin/Store/support/SupportIndex.jsp?BV_UseBVCookie=yes.
2. Enter "Epson Stylus NX420" in the Search Box, and then click the "Go" button.
3. Select the Operating system of your Epson Stylus NX420 from the drop-down list, and then press the Next button.
4. All the software and drivers right for your device will be displayed in order. Find the driver that you need and click the Download button.
5. Save the driver file (.exe) in a suitable place, such as Desktop.
6. Double-click the driver file that you downloaded just now and follow the instructions.