I've tried to google the hell out of this issue, but to no avail...
So recently I bought a decent laptop on sale along with my sister, we both play Diablo 3 and it runs it (graphically) perfectly (almost no fps issues at max settings). However I have been getting frequent internet latency issues and even complete disconnects.

To elaborate, frequent as in sometimes once a minute I get 5-10 seconds of hanging (i guess packet loss), then it comes back to normal, or sometimes I get complete disconnect from all internet for 30-60 seconds. Other times, for no apparent reason, I can play smoothly for an hour or more. I have programs like steam and chrome open in the background that I try to use when this happens, but the internet loses complete connectivity (not necessarily a Diablo 3 problem)

Now the reason I mention that my sister has the exact same one is that she is not having any of these issues, I thought maybe our router/ISP was the culprit, however last weekend she came round, we both played together, and I had all of the same issues, meanwhile she had NONE. We literally have the same laptop, bought at the same time from the same shop


I've googled and tried many a thing, using Wlan optimizer (stops it searching for better networks every X seconds) installing "alternative" drivers, and even completely wiped my laptop back to factory settings, all to no avail.

I was wondering if there was a good way to diagnose the issue and hopefully solve, if not improve, it? It is really frustrating to have everything working ALMOST flawlessly,.

Any help would be much appreciated, the internet seems filled with the same suggestions I've tried and have not succeeded.