what model router? what model modem is connected to it? have you reset the router to default?
if you open a command prompt [start, run, type "cmd" and hit enter]
and run "ipconfig /all" what does it report after vista tells you it can't repair it?
if you open a command prompt [start, run, type "cmd" and hit enter]
and run "ipconfig /all" what does it report after vista tells you it can't repair it?