When I start up my computer, which runs Windows 7, any startup program that tries to connect to the internet throws an error, and if I immediately start up my browser or mail reader they can't connect. At first I would try and fix the problem with ipconfig, which usually seemed to work, but eventually I discovered that if I just waited about five minutes that everything would usually start working. I have a wired connection from my pc to a router to my modem. The router also connects to a wireless hub, and because of that I know that my Internet itself is working, because my wireless devices all connect fine. It's only my PC that gives me problems.
Is there some way to figure out what the hold up is?