Problems with wireless adapter or access point?

I've just recently purchased an Acer Aspire with Windows 8 from Tesco's. When we brought it home, things worked fine. But a few hours in, the Wi-Fi started to play up. It connected, will work for about ten minutes, and then the little yellow symbol with the black exclamation mark would appear. I'd then troubleshoot it and then it would come up with 'Problems with wireless adapter or access point'. My internet would work again, but then about ten minutes later again, it would repeat the previous process. It also seems to do it more frequently, when I'm doing more on my laptop. Like, running Netflix and Tumblr at the same time etc.

The only reason, I'm doubting that it is actually a problem with my Sky broadband, is because it works perfectly fine on my old HP laptop and iPhone. Is there a problem with my new laptop, or is this actually something to do with the router? And what can I do?

Try right clicking 'computer' in the start menu and going in to 'manage' from there you will select 'device manager' On the list look for 'network adapters' expand the options and right click each one and press update drivers. It could also be faulty so you should ring Acer or tesco and ask them for support.