3 PC's running XP and an Xbox connect to a Belkin N1 router/adaptor and a Virgin modem. Suddenly, either one or all of the compters will not connect and the Xbox does - or the opposite in varying patterns. All completely illogical. No settings have been changed. The only software recently added is Office 2007 and the usual Microsft security updates. At the time of writing, this PC is the only one connecting out of the usual 3 plus the Xbox. We have reset the modem each time with some success but the problem continues.1 person needs an answerI do too