Toshiba Excite AT300SE Root
Rooting is done with the help of motochopper app done by (Dan Rosenberg) from XDA.
Do it with your own risk
Download the Android ABD driver for Toshiba site (Android WinUsb Driver).
Extract the zip file to C :\(after extract there will be folder C:\usb_driver),then connect the tab to PC or Laptop by putting it into USB Debugging.
Open device manager in the computer. Right-click the device name and Select Update Driver Software. This will launch the Hardware Update Wizard.
Select Browse my computer for driver software.
Select Let me pick from a list of device drivers on my computer
Click Have Disk, click Browse and specify the folder of C:\usb_driver
Click ok in the wizard.
Click Install this driver software anyway
After installing the drivers successfully .Download
and extract from the zip to desktop. Then open the motochopper folder
and click run.bat and then follow instruction.
If everything goes right there will be SuperSu app installed in the tab. As soon as you click on it automatic update the binary.
Connect the tab to internet for later update of SuperSu for Google Play store.