Why does my tablet reset every time I reboot?
All problems from busybox bad installation path..
Solution from here http://tabletrepublic.com/forum/teclast-a10t/factory-reset-after-every-restart-shutdown-1533-2.html 

If device isn't root you should root it .Used Unlock Root and Tasselhof Market.
Also downloaded &amp; copied Root Explorer to microSD.
Install and run it.
Go to /system/xbin and find busybox.
Move it to /system/bin
reboot &amp; profit  

All download links are on that forum