Cant download anything from any browser

I just installed windows 8 and thought everything was fine. But then when I went to download a driver from the internet, I figured out it really isn't. I have Atheros AR8151 gigabit network adapter installed in my Sony Vaio, and it had been disabled automatically, I had to download driver from its own site and install it. After that it didnt get disabled on its own and when I could finally access internet, I was shocked once again. I tried to download a bluetooth driver from Sony's website but no matter what browser or download manager I tried to download it from, it wouldn't I thought it was limited to just that website and went on to download another driver but it wouldn't either. On chrome it would start as usual download and eventually decrease the speed until the error was shown, while the download speed was going down, the ETA and downloaded size didn't change. And while using Firefox it started the download as usual but after a while it would freeze and i had to press pause and play to get it downloading but the freezing thing happened too much(chrome wouldn't respond to pause and play). Then i tried a download manager and it showed similar problem as Firefox. The thing is I can browse the internet perfectly fine although it feels a bit slow, the problem is i cant download anything. Thanks in advance for any help

Hi Harihari,
I had same problem and tried everything to fix, finally got in chat with win8 support and after trying several solutions enabled remote support session, tech knew his stuff but couldn't find a fix so he had me do a system reset from win8 settings. I had to reinstall stuff after that but it fixed the problem now IE, and firefox work gr8. give it a try--jeffreyx