Everything worked fine till ,today no connection

[Sabbatroll]

I have a 1yr. old Dell about 12 gigs left of storage,Isp is cable ,via Warner Cable.Have been using the same compute,r ISP, and Limewire for 1 year, then today, after doing alot of surfing and downloading today ,I restarted the computer properly and for the first time none of my awaing source downloads were there and nothin on connection, ILater I unistalled LW and installed newer version 4.14 with same result. I have rebooted computer every way posssible. I have Java 1.5 , firewall is Mcafee, which has and says it will allow LW in.Even after itI turned off mcaphee completelyt he brick was still in front of the globe, and that thing above it that allows direct connect said I had a firewall or rrouter in the way. I have tried the simple suggestions, but am hesitant to start screwing around with my system since my knowledge is limited and I have not read any postings with similiar breakdown. Any help is greatly appreciatted.