How to turn off Wifi on ASUS RT-AC68W Router

There is no way to turn off the main 2.4GHz and 5GHz wifi via the web-based admin console. 

Press the wifi on/off button located on the side of the router.
The 2.4GHz and 5 GHz lights on the front will turn off.

Microsoft Office Activation Error 0x80070190

You've recently installed Microsoft Office but after entering the serial number and proceeding with the activation process via the Internet you get the error 0x80070190.  I believe this means, you don't have Administrator privileges to perform the activation.

On Windows 7/8, right click on one of the Office apps e.g. Microsoft Word, Microsoft Excel, etc. and select "Run as adminstrator" -- this will take you back to the activation page so you can finish the activation process (via Internet).