Hi, I have a Window N11 tablet which is one of those cheapo ones but want to try and get it working for the kids to play with. When I power on, it displays the 'N11' logo and then recovery system v1.3.35. The next message is "E:check failed, Recover failed, please reboot and recover again!" The only option I can select is 'Reboot system now'. Remaining items that I can't select are factory reset, system recover, update from sd card and update from udisk. Can anyone help please?