Drivers won't install Windows 8 help?

Alright, so I just tried to install the INF driver file for my Uno from my Device Manager after installing the Arduino IDE, and I received this error:

Windows found driver software for your device but encountered while attempting to install it.

Arduino UNO R3

The third-part does not contain digital signature information.

If you know the manufacturer for the device, you can visit the website and check the support section for driver software.

So, how am I supposed to fix this?

Quizmaster:
…So, how am I supposed to fix this?

No offense, but Google would have revealed in 5 seconds that others have had this issue, and that there are workarounds. eg: [http://arduino.cc/forum/index.php?topic=94651.15](http://arduino.cc/forum/index.php?topic=94651.15)