it seems like the second stick of 1GB memory is causing tcpip,sys errors. my two choices (and there are probably more) are 1, W2K does not see the second stick and it just being there is causing the crashes; or 2, the stick is bad. both are Kingston 1GB sticks, no more than two months old on a two month old computer. I have the second stick off the MB to see if the crashes stop and knock on wood, they have for now.