It might be best to Google it, or look on the manufacturer's website for specific instructions, or look in any sort of physical manual that might have come with the tablet.
While there are a lot of intelligent users on these forums, there are also a lot of different tablets (and operating systems) on the market, so even knowing specifically what you have doesn't guarantee anyone here would know. Plus, the manufacturer's website or a manual is more likely to be able to give clear and specific instructions for your specific model and OS.
