I'm sorry it's been awhile...I was just too frustrated to deal with the computer anymore. I tried your advice from below. I downloaded netdiag from the microsoft site and put it on the machine but...

Thanks for the idea. I tried it but it didn't fix the problem. :( Any other ideas?

OK, so I can go into device manager and into the network option but how do I know if my lan card was corrupted? And how would I install it back? Thanks!

I work in a small office and we have a network of 5 computers. They were running slow, so we decided to run Malwarebytes Anti-Malware Removal. There were several trojans on each computer, so we...