Please verify these things:
- On the root of the flash drive, "F:\" assuming the drive letter is F:, there will be a file INSTALL.wim. IIRC it should be at least 1.5gb.
- In the "sources" directory there will be a file BOOT.wim it should be somewhere between 200mb to 500mb
If both of these are true for your drive please continue. Otherwise post your issue.
Option 1: Attempt a minor repair, which may be the root issue
Before continuing remove all other flash drives from the computer.
- Open the command prompt on a Windows Vista/7 computer by pressing Windows Key+R, typing "cmd", and clicking ok.
- Type "diskpart" and press enter. Type "list disk", press enter. There will be a list of drives attached to your computer. Find the one which has the same size as the flash drive, remember the drive number listed to the left of this size.
- Type "select disk [NUMBER]" where [NUMBER] is the disk number identified above, press enter.
- Type "list partition", press enter. There should only be one partiton listed, if not STOP NOW, and verify what you have done so far!
- Type "select partition 1", press enter.
- Type "active", press enter.
- Type "exit", press enter.
Option 2: Use different boot media
You will need a Windows 7/Vista DVD to complete this option, but we will put the FIRST image on the classmate.
- Boot from the Windows Install DVD.
- Select default options until you get to the page which has the big "Install Now" button. DO NOT CLICK IT!
- In the lower left corner of this page there is a link which says "Repair my computer". Click it.
- After a moment there will be a window with several repair options, select Command Prompt.
- Plug in your FIRST imaging flash drive.
- In the command prompt window type "notepad", and press enter.
- Select File>Open, and verify your FIRST flash drive is deteced. Remember what drive letter it appears as. Close notepad.
- Type "cd [DRIVELETTER]" where [DRIVELETTER] is the drive letter of your flash drive.
- Type AutoInstall, press enter.
- The imaging will begin, and proceed as intended.
- Reboot the Classmate.
If neither of these options work, please post what error message you receive.