UIDs inconsistent problem on CnM tablet


Mar 8, 2013
I have just bought a new CnM 7" tablet. I have loaded apps and also a couple of films on it. The problem is that now as soon as I switch it on a display comes up saying 'System UIDs Inconsistent'.
There is also a message ' UIDs on the system are inconsistent, you need to wipe your data partition or you device will be unstable'
There is also an icon I'm feeling lucky but once you press it tells you 'Unfortunately, Email has stopped'
I can't get into the menu to do a factory reset, cause it won't let me access anything.
i tried resetting from the back of the tablet but the same message keeps on coming up.
Any help on what I can do ?