Advent DT2410 Wireless Cut Outs - Tested Nearly Everything

I purchased an Advent DT2410 about a month ago from PC world. It came with Windows 8 OS a USB wireless stick and the following basic spec:

Intel® Core™ i5-3330 processor
Genuine Windows® 8
Memory: 8 GB
Hard drive: 2 TB

So initially brought it home, set it up and fired up connected to the internet perfectly fine with the stick. Then about once every 2/3 days, it would pick up no internet connection despite being next to the router and after 2-3 shut downs in a row would work again. When the connectivity icon was blank, I would go to trouble shoot it and windows 8 wouldn't do anything, not even attempt to detect the problems (bare in mind this PC is brand new).So I leave my home by my University and came back to my parents for Christmas. Lugged my PC back with me and set it up.So first I connected to the wireless no problems, loaded up my favorite forums and after image hovering over about 3 images the 4th would only load the top 3rd of the picture. Open up new tabs "Connecting" until:

A) Server would time out

B) Wireless would DC and then reconnect (before basically repeating the "3 image view")

C) Would work for a few hours (e.g. a streamed film) before screwing up again (rare)

So, reinstalled drivers, replaced the USB wireless stick (802.11n.) AND STILL problems problems problems. I then cleared the IP/TC stacks (I believe they're called) did it through the elevated command prompt and still nothing. So i'm using my sister's laptop to write this as my internet on my PC barely runs long enough for me to be able to check this page or download the program mentioned in the sticky.