Hi there, these instructions are for the archos 705 but they are the same for the 605.
A) Download the firmware from Archos and save it to your desktop (Make sure the file name on the desktop hasn't changed from the original download file name)
B) The Archos 705:
1- Connect the unit to its power source.
2- Start the unit in recovery mode: Press the TV button first then the power on/off and keep pressing TV button (do not release it)
3- The recovery mode will start (the screen that asks for repair or format etc…)
4- Select "Repair"
by scrolling up and down with the TV Button (it is all explained to move through the menu at the top of the Archos screen) (Do not press "Format"
at any time)
5- Now that you are on "Repair"
select it to validate your selection
6- The unit will go to "Plug the unit etc…" plug it with the USB cable to the computer
8- Wait until Pc should recognizes your Archos (around 5 seconds)
1- From your computer select the firmware file you downloaded from the net and put it in your Archos (in the root folder, nowhere else, where it has the folders, music, videos, pictures etc… as a file)
D) On the Archos 705:
1- Select "Ok" on the Archos (on & off button) shortly to select and confirm the file is now on the Archos
2- you are done! The Archos 705 should now read through the file you have transferred and repair the system
3- DO NOT DISCONNECT the power cable until the process is finished
4- When done safely disconnect (as you usually do, for Mac trash the letter of the Archos to the bin or for PC's: right click the green icon bottom right of the screen for xp & vista)
5- Press on/off button to reboot
Your unit should restart with a fresh repaired, updated system like day one.