Wi-Fi/Internet problems on my laptop?

I've had this laptop for only a couple of months. Starting from January 1 of this year, I've had some internet problems. Most of the time I can connect to networks, but then it stops working. Sometimes I can use a network for anywhere from it not working when I connect (Chrome giving that error message of "not being connected to the Internet") to a few hours. There are 3 routers in my house and 2 at school, and I have the same problem with all of them.

Usually, if my Wi-Fi stops working, I can just disconnect and re-connect/switch to another network and it works. However, sometimes, none will work and and I just keep re-connecting to different networks and I just waste my time. It's extremely frustrating. It makes playing League impossible because either I'm constantly lagging and DC'ing (with my ping at several hundred) or I'm afraid that at any moment, my internet's gonna stop working.

In device manager in the control panel, it says my Wi-Fi adapter is working properly. I've tried updating drivers, but Windows says my drivers are all up-to-date. Can anyone help?

I have an HP Pavillion 360x (13.3") with a Qualcomm Atheros QCA9565 802.11/g/n Wi-Fi Adapter.