Hi Slade
have you checked for virus ?
spyware ?
downloaded something you shouldnt ?
no seriously, just typed into google "internet cuts out after 5 mins"
there was no real decent answers, but i found something about
ipconfig /renewwould be helpful if you told us your Operating System, Memory, Internet connection type, ie Dialup/DSL/Cable etc.
Im sure somebody might be able to help you.
ShadowDemon
Just lurking