Ok i installed .85 and my battery life sucks i cant make it a day idling without the battery dieing. So i want to downgrade back to .83. Now i have searched the forms and everyone says the same thing. Delete the os from the computer and open up dm and it should bring up a list. Well i do this and it brings up a list, and then i select .83 and hit next. After that it says searching for available device software. Then it comes up and says no update is required. Anyone know what to do or what im doing wrong.