To resolve the issue use the following procedure.
How to Fix Computer disconnects from a wireless network?
↣ Click on Start >> Run >> type ncpa.cpl >> OK.
↣ Right click on your wireless network connection, And then click Properties.
↣ Click the Wireless Networks tab.
↣ Under Preferred networks, Click on wireless network, And then click Properties.
↣ Click the Authentication tab, Click to clear the Enable IEEE 802.1X authentication for this network , And click OK
↣ Click on Start >> Run >> type ncpa.cpl >>click OK.
↣ Right click your wireless network connection >> Properties.
↣ Click on the Wireless Networks tab.
↣ Under Preferred networks, Click your wireless network, And click Remove.
↣ Click View Wireless Networks.
↣ Under Network Tasks, Cick on Refresh Network List.
Under Choose a wireless network, Click the wireless network to which you want to connect, And click Connect.