When you plug in the tablet,It should ask you if you want your device to charge only,Media transfer,PC Connect...
You what to choose pc connect,This is where the usb driver is stored.Then you can install it.If you don't have any settings like that,Try the manufacturers website.
You what to choose pc connect,This is where the usb driver is stored.Then you can install it.If you don't have any settings like that,Try the manufacturers website.