[Q] TPT "error while restoring /system" problem topic

my problem is that suddenly my TPT hangs and keep rebooting, it starts the system normally then it hangs for 3 sec then reboots and so on

-from CWM i did wipe data factory reset and wipe cache partition, but the problem still occurs

-i tried to restore a backup and i get this message "error while restoring /system"

-i tried to make advanced restore, all options can be restored normally except for restore system i get the above message

-the new now the tab is not rebooting and stuck at the lenovo screen

-now i tried to install CM10 ROM from my internal memory and it installs normally

-when cyanogenmod screen loading then it freezes for 3 sec and reboots again and again

any advice and suggestions will be greatly appreciated