have you tried to completely uninstall the talktalk modem and software and then after a reboot to clear everything insert the cd and do a clean install. So far having had tt broadband now for 3 weeks it is working ok [only 3 months wait to get it] If you have another modem install that and just enter your phone no.@tt and password and it will work. You do not have to have their modem or use the cd. with my 2 pcs 1 has the tt modem but the other has my previous modem both work fine.