Using linux on windows machine

Do you have a wired network available you could try? Also, if you have access to another computer that does have internet (use a library connection if you don't own another computer), Google for your distro and wireless card to try and see if others are having similar problems. Two computers means you can Google while you tinker/test, though you can do it in a dual-boot setup.

I agree with Laharl, what type of networking are you doing? Wired or Wireless? If its wireless, what type of wireless card are you using?

In the future, if you didn't want to necessarily dual boot, you could run Linux under windows using something like VMWare or Virtual Box.

Regards,

Jeff

OK, I'm trying to understand your question, and this is what I'm guessing:
You have a Laptop, which came with Windows preinstalled. Now, you also want to run Linux (Ubuntu) on it. You installed it as a dual boot system, but now the network connection (probably wireless) won't work, correct?

If so, we'll have to know what wireless device (normally either built in to the Laptop, so we'll need the model name and number of that, or external, e.g. a PCMCIA or USB device) you're trying to use, what encryption the wireless network has (just "none", "WEP" or "WPA" and a few more descriptive words will do fine, you shouldn't post any information about your password or -phrase) and possibly how you connect under Windows.

This will probably be a Linux issue, but we'll just wait an see.

Oh, if you should want to install Ubuntu within Windows, the LiveCD will offer you that possibility via something called Wubi. No need for VMWare or VirtualPC. ^^

Greetings,
Nepomuk