If all else fails, when your wifi network just won't work with the inital update (all should work after that), a serial update is the surest easy way to get an Oak updated.

We recommend CH340G based serial to usb adapters - such as these: http://www.ebay.com/itm/USB2-0-To-TTL-Serial-6Pin-Converter-CH340G-f-STC-Arduino-PRO-replace-PL2303-N136-/111937225684 or these https://www.seeedstudio.com/CH340G-USB-to-Serial-(TTL)-Module%26amp%3BAdapter-p-2359.html

If you are using that adapter install the windows driver: http://www.arduined.eu/ch340-windows-8-driver-download/ or OSX driver: https://github.com/adrianmihalko/ch340g-ch34g-ch34x-mac-os-x-driver

Connect your Oak to the adapter as shown:

Then plug it in to your computer.

Download this zip file: oakupdater2.zip

Unzip and enter that directory.

On Windows: Double click on update.bat - when prompted enter the COM port of the USB-Serial adapter you have connected. (You can find this in device manager)

On OSX/Linux: Open a command line in that folder and execute the following commands:

chmod +x update

and then

./update

When prompted enter the path of the USB-Serial adapter you have connected - ex: /dev/ttyUSB0. (dmesg | grep ttyUSB should tell you the name)

If you receive an error message similar to the below message, you need to install python serial (sudo apt-get install python-serial is the typical command line install command).

Traceback (most recent call last):
  File "esptool.py", line 22, in <module>
    import serial
ImportError: No module named serial

After the update go back to this tutorial - http://digistump.com/wiki/oak/tutorials/connecting - and register the Oak with the Particle Cloud - but you will not have to update it.