This i due to Windows 8 limiting the connection for managing power on the device. So you can solve it by disabling power management on the device.
Win key>Control Panel>Network & Sharing Centre>
View your active connections>Connections>Choose ‘your’ wifi connection
Wifi Status window>Activity>Properties>
Untick Allow the computer to turn off the device to save power
Joel G Mathew, known in tech circles by the pseudonym Droidzone, is an opensource and programming enthusiast.
His favorite pastime is grappling with GNU compilers, discovering newer Linux secrets, writing scripts, hacking roms, and programs (nothing illegal), reading, blogging. and testing out the latest gadgets.
When away from the tech world, Dr Joel G. Mathew is a practising ENT Surgeon, busy with surgeries and clinical practise.