Hi,
Please do try these troubleshooting steps that may help.
- First is to uninstall/reinstall the Wifi Adapter.
- Go to Device Manager and uninstall the Wifi Adapter.
- Once uninstalled, reboot the laptop and it should reinstall the driver automatically.
- After the reboot do try connecting again and see if it will work or not.
- If it will still not work, check if other devices that uses wifi can connect or not.
- Do a power cycle with the modem and router first if other devices will not connect as well.
- Turn off both Modem and Router for a second then power then back on.
- If all these will not work, do also run System Restore.
- Here's how:
http/windows.microsoft.com/en-us/windows-8/restore-refresh-reset-pc
- And if System Restore will still not work, last option would be to reinstall Windows.