USB wireless connectio

Hi there

This one's kinda strange:

I do not understand why my usb wireless connection gets cut after some minutes. When I start my notebook everything (internet connection) is fine for some minutes, but after a short while it gets suddenly disconnected. Then I have to "repair" it (right mouse click on the little pc icon), then it works for about 30 seconds again, then it gets automatically disconnected once again. Over and over.

I don't think this is quite logical, isn't it?

Also: does anyone know how to boost the capacity of my usb wireless stick? I barely can reach the networks I need. Maybe this is part of the above mentioned issue.

Thank you guys!