Hi there,
I myself am a Lenovo Y450 user. After reading from the internet, I found the solutions;
1. Uninstall Ready Comm software
2. Delete ALL network profiles (Network and Sharing Center -> Manage Wireless Networks -> Select Network, right click and remove)
3. Uninstall wireless network adapter (Device Manager -> Network Adapters -> WiFi -> Right click and Uninstall)
(In popup menu, Keep it unchecked - for removing the software. You need the software)
4. Run cmd as administrator and type
netsh winsock reset
5. Reboot
6. Let system install wireless driver
7. Setup your wireless connection again.
I'm going to try it out. Lets hope everything go smoothly!