D-Link DFE-538TX Network Adapter "host unreachable" Questions

...host unreachable my lan card suddenly stops working and it displays destination host unreachable, i bought a new lan card and installed it without any errors , but the problem remains the same , i ...

...host unreachable. if I instal the intel express installer drivers then the icon and the net is coming all right. this i had to repeat,each and every time i switch on PC. why it is required to instal ...