DHCP version



I'm connected to the internet via the DHCP protocol. I have problems connecting to the internet with IE or Mail, after I have switched operating systems and have restarted.An IP address shows up in the TCP/IP panel,but IE or mail can't connect to a server.After restarting the system 2 or 3 times they can. This doesn't happen when I restart in the same operating system I was using before. Does someone recognize this problem?