I have a PC that was attacked by a virus that corrupted the firewall. I have since removed the virus using malwarebytes, combofix, tdskiller, ect. After the removal of the virus the firewall would not start which is not uncommon now. I just had to add registry entries for the BFE, Mpssvc, and share access, and give proper permissions to them. The computer runs just fine now, I can access the Internet, I can ping other PCs on the network ect, but i cannot ping my own address or loopback address (127.0.0.1). The reason this is a problem is because no other computer on the network can connect to a shared folder on the problem computer nor can they ping my computer. This occurs with the Windows firewall turned off and no other antivirus or firewall even installed on the computer. I have also reset the IP stack and tried a different network card. I need to be able to share out a folder on this PC so any suggestions would be helpful.
Everything is being done from all Windows 7 PCs.