Install Arduino Drivers to Your PC
You just got an Arduino board, and it wont work? Well, I will fix that for you!
Head over to Arduino.cc, and download the software, and extract it.
Plug in your Arduino Device. Older Devices will be installed automatically. New ones, (like the UNO) will require Drivers. But not to worry, as the software has drivers!
Click NO if Windows asks you about Windows Updates.
Click Install from a list or Specific location (Advanced)
Uncheck everything that Windows has selected (Except for: Include this location in the search)
Navigate to your Arduino software folder (You extracted), and select the Drivers folder for searching in.
Windows will begin installing the drivers, so be wait a little bit.
Now the drivers are complete, so head into the Arduino Software, and start coding!
Also, make sure to choose YOUR Arduino in the second picture.