Giggster

Im using the net, its an issue, i get an error in my Eventvwr saying issues with the DHCP

My internet is constantly disconnecting me appx every 30minutes Ive tried renewing the ip and all that, ive had cable guys into replace my modem and a few cables, they say its all fine, Ive ran Ad-Aware 2007 and aVG no viruses or anything. Rogers Cable, Hi-Speed is my ISP Also im not connected to any router or anything, i was at one point but not any more. I get an Eventvwr error when i DC which is Sourse: DHCP and ID:1002, my ISP says theres no matience or anything going on at the DHCP server is fine on their side Help please!