how can I revert my os from xp pro back to windows 2000?

I have a dell gx110 optiplex , a friend gave it to me,anyway I had installed xp-pro and I have'nt been able to connect it to the net by my dial up(thats all I have) I have tried everything wizards,drivers,etc still nothing, I wanted to remove xp and run the 2000 at least til I get a connection on it, how can I completely restore the machine and start from scratch? the system came with windows 2000 on it, please any help will be appreciated.:wave

 

You must reinstall Win 2000.

 

Without a Windows 2000 installation CD and product key, you can't do much. If you have a dual boot set up where you're prompted which OS you want to boot into, and you choose WinXP or Win2000, then it's no problem. But if you installed XP Pro over Win2000, there's nothing you can do, unless you used an upgrade CD. If that's the case, read this: http://support.microsoft.com/kb/314052/en-us This explains how to restore a Win98 or WinME installation. I don't think you can bring back Win2000 after installing XP, but I'll keep looking.

 

Thanks any help, is it possible to restore factory set up with a dell image file or whatever? I was checking on Dell and they do have something like that but I don't know which one.?

 

Have the friend who gave you the computer go here
https://support.dell.com/support/topics/global.aspx/support/dellcare/en/backupcd_form
Because the computer shows him/her as the registered user, Dell will send the proper backup discs for the optiplex. Note: this is probably not free.