Help needed with Internet Drivers

Note: This is my first time using this forum, I apologize if this is in the wrong section.

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Okay, so, I recently got a very bad virus on my Dell Laptop. This laptop is a Dell Inspiron E1505. I decided to wipe out the harddrive, because the laptop had little or no function due to the virus. Little did I know, since this was the first time that I had ever wiped out a harddrive, that my internet/audio/video drivers would be wiped out too.

Now keep in mind, I'm not worried about any other drivers at the moment, just my internet drivers. So, I found the disk to re-install those drivers, popped it in, but then it said I needed the system model. I looked for E1505, or just 1505, or 6400, and it wasn't in the choices. I was so stressed out at that point, that I decided to just install a few drivers under the Network option. So, I extracted them, and installed them, and honestly, I can't find one thing that has changed. Internet explorer won't connect to the internet either.

So, I decided to check out Dell.com, using my MAC, which I'm obviously using now. I went to drivers/downloads, entered my service tag, went down to networks, downloaded all of them, installed them, and once again, no difference. I can't connect to the internet, and even when I check device manager, I get a huge yellow question mark in other devices.

I have a wireless router, and it's connected and on almost all the time.

Help? Feel free to ask me questions here, I will respond.