Hopefully someone can help here. a PC on our network lost it's network connection. In the Network IP settings all our PC's are set to obtain IP address automatically and if I manually set these it regains network connectivity. I have checked on another PC when doing IPCONFIG /RELEASE and it release the settings & when requested IPCONFIG /RENEW the domain server re-issued an IP address so there appears no DCHP issue on the server. Also if the IP settings are made manually, when the PC reboots it goes back to automatically obtain IP address. I have a sneaky suspicionj there maybe some at large worming around even through Super Anti Spyware, Malware Bytes & AVG (paid Network version) can't find anything.....Heeellllp!