Computers on the home network block others out but let others in with no obvious differences in the setup. I have had two computers that have reversed the situation on each other. First one computer my main desktop computer blocked out my laptop but let all others on my network, xp or 2k's and then after I reformated that computer the laptop could get in. This computer had sp 2 at 1st but was rolled back - it needed the reformat to clear up the blocked access to all computers -well to the laptop. I installed sp2 on the laptop and it has blocked out my desktop computer, but lets the others have access - i have rolled back sp2 - and still blocks it out. I am now thinking of reformatting the laptop which belongs to my work btw to see if it clears the problem. As an side on the laptop since sp2 it has contiuously locked out my usual login at home, but works fine on the domain at work.