Hello I would like to comment that I’ve been experiencing similar problems with my internet connection but that it has been caused by Avast anti virus interfering with my network adapter’s drivers. I tried switching to another harddrive that i have which is running on Windows XP and that doesn’t have avast installed on it, and internet worked absolutely perfectly. When I switched back to my main harddrive my internet was working again. I was told by my isp provider that avast seems to be affecting people’s network adapter a lot and that they have been receiving a lot of complaints originating from this issue. Maybe Avast developers might want to look into this and see if it can be fixed.