What is the operating system of your HP Laptop?
If it's Windows Vista or 7, you may need to go to Network and Sharing Center > Manage Wireless Networks > Delete the existing wireless network that you are trying to connect then restart.
If still recurring, you may need to manually input SSID and Encryption settings via the same page.
But if this is Windows 8, Change PC settings > Network > Then forget the network
Another source of this issue is that you network adapter may not be compatible for the 802.11 version of the hotspot.
You can also try to change the encryption settings of your hotspot