LAN connection !!!

I'm connected to internet through network in my university.
After a few days, my pc slow down when i boot up.
When i on my pc while it is connected to the network, it takes around 25second to start all the windows services and all the system tray application(norton auto-protect)

But, if i unplug the cable from my "Network Switch" all the windows services and system tray application(norton auto-protect) takes only 1-5 second to start.

Please help me, i couldn't find the problem.
Is it the network card, network switch or what ????

Thanks guys..

If you love something set it free, if it doesn't come back, hunt it down and kill it !!!
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  1. There is no problem - this is normal...

    Ya probably have your network card to "Obtain IP address automaticly"
    This is what is taking time at startup - your box checks the LAN for a DHCP server which will pass out an IP addr and your box must config your network connection with what it recieves... this takes a little time...
    Unplug from the network and theres no setup/config recieved from the DHCP server... a quicker startup - but no network coniguration...
    NO problem - just the way it works...
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