We have a high speed internet connection for 3 computers through a D Link router. I reinstalled WinXP Home SP3 and all my programs onto computer "A" about 3 weeks ago. I have automatic update switched on and Sunbelt Vipre anti virus & anti spyware on automatic update & daily scan. Yesterday computer "A" lost the internet connection but after rebooting the computer, I could connect again. 10 to 20 minutes later the connection stopped again. Reboot & all is well for a while. Both of the other computers stay connected to the internet through all this and this problems does not affect computer to computer networking. What is wrong?