Right! Sorry, this is a long one. It all started on a dark, cold evening... When I noticed the internet running slow. I couldn't be bothered looking into it too deeply as I knew I would get much improved speed from tethering. This was working fine until the inevitable occurred, I ran out of data. So it was back to my broadband. It was still running slow so I tried a few things such as changing the Wi-Fi channel and updating the drivers etc. but nothing worked. Eventually, it died completely... it wasn't just on the Surface so I gave my provider a call. They did a line test and found a problem and sent round an engineer to repair it. Jump to a week later and my Windows 7 PC is working fine, my PS3 is working fine, my iPhone is working fine... Surface Pro? Not so much. Websites stall and can take more than 5 minutes to load in some occasions. I tried downloaded Google Chrome and after 40 minutes it cancelled saying the download had failed. I knew it wasn't the phone line at this point and was thinking about what had changed since I last had it working. The first thing I thought of was updating to Windows 8.1 and I searched online (on my iPhone!) and found there were other people speaking of this too. So I bit the bullet and reverted back to Windows 8. It worked! For a bit, but then it went back to behaving just how it was. Now something else I had previously heard of on here was the Wi-Fi getting interference from bluetooth devices. I was running Speedtest.net with and without it turned on, and definitely noticed a difference. I have two devices attached; a Sculpt Mouse and a Logitech adapter for my stereo. I tried loads of difference tests and at one point it seemed conclusive that with one device on, it was okay... but with both on the Wi-Fi was failing. When I say fail I mean the Mb/s drops down to 0.01 and stays there. However it's still completely random, sometimes having both on works fine. I just can't find a definite cause and it's driving me insane! Knowing it wasn't the OS I've started downloaded Windows 8.1 again and I've left it going for 2 hours now and it's just hit 15% :disappointed: it's just not right... I know I can't really phone my provider again because when I say it works on other PC's and game systems etc. they won't wanna know. I was thinking of phoning Microsoft. Any ideas? Really need help on this one! Thanks.