Is very important to know if you are running a 64-bit or 32-bit version of Windows in case you are installing a new hardware or update existing hardware driver.
This tutorial will show you How To Know if You are Running 32-bit or 64-bit
Checking in Windows 10 or 8
To check what version you’re using on Windows 10 or Windows 8, just search for “System” and press enter or select it from the results.
You’ll immediately see the version you’re using, whether 64-bit or 32-bit.
Checking in Windows 7
1. Click on the Start Orb-> right click Computer-> Properties.
2. You will find the the information next to System type: