Wireless disconnects.

Hello,

I have a problem where my internet will disconnect for 1-2 minutes every time I try and stream a video. It doesn't matter what video player or what website it is. It will just stop buffering and my whole internet will be disconnected for a minute. It's been happening for months now and I still havn't come across a solution. I also have 2 laptops which are usually connected to my network but the connection on them seems fine. Both laptops can stream without a problem, and their connection stays when I lose mine. I don't really know how else to explain it, but it's really annoying when i'm trying to do loads of different things at once.

My computer is a Sony Vaio LA2 and i'm connected wirelessly to a sagem sky broadband router (I don't know if what is the real name for the router). I have a wire going from the router to my bedroom but I don't use it because I couldn't figure out how to use the wired connection instead of the wireless, haha.

I havn't heard anything about Sky as a broadband provider, but it's cheap and there are no other problems so my dad won't change lol.

Thank you in advance, sorry if my post is a little long.

I'd be happy to give any other information if needed.