Windows 7 - Reinstalled windows 7, drivers dont work and can't connect to internet

I reinstalled Windows 7 last night and when it booted back up the screen resolution has changed, I have several drivers that aren't working and I can't connect to the internet. Any thoughts?

Reinstalled how? Clean install, factory restore?

Clean install with the DVD

OK, sounds like you have some hardware that needs drivers installed. You'll have to download them from the manufacturers web site's support section for your PC. Something you probably should have done before you did your clean install. Now you will have to download them on another PC and use a USB thumbdrive or other media to transfer and install them on your PC. I'd install the drivers for your network card first, then once you have a working Internet connection you can download the rest directly to your problem PC. Device Manager should show you what's not working and requires drivers.

Is your computer self-built or bought from a computer manufacturer?

If it is the latter, go to their support site where you can download all the drivers you need.

As alphanumeric says, have a look in device manager for anything that has a yellow question mark against it, which indicates a driver is needed.

I'm at dell's website right now, how do i know which drivers i need?

The "Network Controller" has a yellow question mark next to it but on the dell site there are 11 different drivers listed under "Network". How do I know which is right?

Do you have a Dell ID number unique to your particular PC? I forget what they call it. Service tag??

If you use that number, it should lead you to stuff that is compatible with your specific PC.

Or post a screen shot of what you are seeing at Dell web site.

I think I found the network one that I need but the other ones are "Etherent Controller", "Network Controller", "PCI Simple Communucations Controller", "SM Bus Controller", and "Universal Serial Bus (USB) Controller". I don't anything for these on the Dell website. Thanks for your help!

Yes the "Service Tag Number" is what you want. It should be listed on a sticker on the PC somewhere. It's also listed in the BIOS. Input that number in the correct spot on the dell support site and it will lead you to downloads for you specific model dell.