Pls kindly check that it needs to be forced to restart with windows system:Just press the power button till sutdown.Then just restart your tablet pcInstructions for use:Position 1: closedPosition 2: OTG + ChargingPosition 3: OTG alone Notes and Frequently Asked Questions:* If Position 2 OTG + charging off when charging is not applicable， please separate OTG applicable appropriated position 3;* After switching gear OTG interrupted again connected;* Some devices may not read OTG， plug or what equipment you can restart;* Some tablet may be because the original charger voltage is too low， encounter without charge， then do not pull down the line， in the case of power， the switch to the back several times， and finally stopped at the Position 2 switch normally， if not you can try several times. Or just change to a charger around 5.3V. Product Specifications:Brand: ACASISProduct Type: H027Color: Black Features:1. Small， lightweight and easy to carry. Just as the size of a pen shape， easy to carry， not the space. Micro USB interface， support hot-hot-plug pulled. Data transfer speeds of up to 480Mbps.2. Supports OTG function and charge electricity. Compatibility， support for Android， win8， win7， Vista， XP， window 2000， ME， Linux and other operating systems.3. The mobile tablet are applicable， support Micro USB port phones， tablet PCs have OTG function， only cell phones， television set-top boxes.4. USB wide spacing.5. Extraordinary material safety and environmental protection， environmental protection ABS shell with high-density material， non-toxic， safe environment， forming technology， durable.6. Standard Micro USB OTG interface cable， Micro USB interface for all common mobile phone must also support OTG function.