Getting the Arnova 9 G2 into Recovery Mode
To enter Arnova 9 G2 recovery mode, press the esc button then using a paperclip press the recessed reset button (its located on the top edge of the Arnova). It will now enter the recovery mode. A rooted verion of the Arnova9G2 firmware is available here. Plug in the micro USB to your computer I have Windows 7 installed. After a time it should show in the Windows 7 Device Manager with a RK29? Device, ignore the ? Now right click on the RK29? entry and select update driver. Then choose the browse option and navigate to the folder where you unzipped the file you downloaded previously, usually the Downloads folder, "arnova G2_full_root_rom_V1.0_arctools\drivers\32bit\win7" that contains the driver for your flavour of Windows 7, mine was the 32 bit driver. Once Windows has indicated that the driver install was successful you can now run the firmware update tool RK29update.exe located in the root of the arnova G2_full_root_rom_V1.0_arctools folder.
I found that after the update I couldn't enter recovery mode it appears to be as described on Recovery Mode