Ok. Nothing is connected to anything now. The router's been reset but it's disconnected. I'll begin with the desktop. I was in the middle of performing a system recovery when it first froze. I wasn't able to use the original mouse connected to the port in the back, but I was able to use a USB mouse and finish the recovery. The recovery was successful but there's still no internet access. When I plug in the internet directly to the desktop (bypassing the router) 1 of 2 things happens. Either I get no response at all or it takes me to some webpage I've never seen before. The cable repairman seemed to think that the port was corrupted and being controlled by someone else.
How can I fix the virus problem if I can't access the internet?
My time is up on the public computer. Thanks for your help. I'll check back tomorrow.
Did you make a note of what web site you end up at? What happens if you try to navigate away from that site by entering a different URL?
Can you verify that your internet connection is working by connecting a PC that you do not suspect is infected (like maybe a friends laptop)? That would allow you to confirm that the internet connection is indeed working properly.
Here is what I would do in this situation:
1) From a public, work, or friends computer, go to the following link and download malwarebytes to a thumb drive.
http://www.malwarebytes.org/mbam.php
2) Go home. Disconnect all network connections to your Compaq (no LAN, no internet, no wireless). Copy the malwarebytes download from the thumb drive to your PC and install malwarebytes.
3) Run the full malwarebytes scan. This will take awhile.
4) If step 3 succeeds in clearing your PC of malware, you will be then be able to connect to the internet. Once you have the internet connection, go to the update tab in malwarebytes and "check for updates" to download the latest malwarebytes updates.
5) Rerun the full malwarebytes scan.
If this does not work, you have a couple options:
A) Go through the process outlined by ScoopLV, or
B) Take the PC to a local computer store for help.