2 months ago I had purchased a Sony VAIO Tap 11 laptop model SVT11215SGB which was working fine without any problems. After sometime I did an upgrade to Windows 8.1 which went smoothly. But after some days, the wireless keyboard stopped working all of a sudden. I have done BIOS reset to default, have reinstalled all the bluetooth and wireless drivers but nothing seems to be working. Does anyone know how do I solve this problem? Thank you
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