Installed Windows Vista - Can't access the Internet

I've recently installed Windows Vista onto my Dell Dimension, Everything seems ok except for I cannot access the internet. When I had XP it was as simple as plugging the Ethernet Cable in the back and it worked fine. But now it won't work, please help.
 
Hey.
Are your networkcard drivers installed for vista?
Try going to Dells homepage and see if you can find some drivers for your computer.
 
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