Okay here's the PROBLEM:

I have to computers, one upstairs, one down. These computers both have a connection to my wireless N D-Link roughter. And they both still connect to the router (I can change the routers settings, ETC.) But the problem is that the downstairs computer now only connects to the router and not the internet.

Here are a few details on what happened right before the problem:

The downstairs computer used to not be able to connect to download.microsoft.com. So I WANTED to fix it. Googled the problem and a guy told me a Trojan was keeping him from connecting and provided a link to software named Trojan Remover that he used to fix the problem. I ran the software and it said it fixed a whole bunch of Trojans and some registry keys.

Ever since running the software the downstairs computer has not been able to connect to the internet, only the router. I am thinking it might have changed a registry key and had that effect.

Any ideas?

Thanks!

It has been recommend that one would first would first try run the Network Wizard again. Reet the PC and see what happens.
Also, did you mention if one was running Vista and the other Windows XP?
Are both into the D-Link with a network cable or is one on wireless?

I've tried resetting a bunch of times. Haven't tried network wizard yet but i will (should i have to if i still have a connection to the router?).
The downstairs one is indeed running XP (service pack 3) while this one (upstairs) runs Vista. Both computers are wirelessly connected to the router.Three rules of Windows networking.
1. Run the Network Wizard.
2. Run the Net work Wizard again.
3. Same as rule 2.
I tried doing what you suggested a couple of times, but now I can't even connect to the router (192.168.0.1). I understand your frustration.
Whenever I am ready to give up, I get a free download of Network Magic.
Here is one link from PCWorld. It is good link, but do NOT download the other stuff they offer. Just get the Network Magic download.
You do not have to buy it or any other software.
http://www.pcworld.com/downloads/file/fid,44361-order,1-page,1/description.html

The right download will look like this:
Thanks for that link! It did not complete my computers connection to the internet, but it did make it able to connect to the router and alter the settings!

Baby steps i guess.

Okay, Every other device in my household still connects to the router and the internet, except for my downstairs computer. :/

Any more suggestions?Update to problem (9/24/09):

I connected an Ethernet cable to the computer and got internet just fine. I ran a software called "Network magic" (By CISCO) and it said it found that I was connected to the internet when I tried to troubleshoot. And I believe I am. All other signs show I am except for the fact that not a single PROGRAM will access it. It appears as if the only problem is that it won't access the internet through my wireless connection.