I have problem on pc that had viruses removed but now can no longer obtain an ip address. After running CCleaner, Combofix, Malware Bytes, Super Anti-Spyware and TDSSKiller. I believed I was home free until running one last scan with Microsft Security Essentials and removing win32.sirefef.gen that was detected in afd.sys. After removing and rebooting I no longer can start dhcp client service, hence not receiving an ip address. If I give a static ip address, I still cant connect. I have replaced the afd.sys file with one from a different XP pro system. Please Help!!