I have an issue with a network for an organization at my college. One of the computers on it cannot connect to the internet (but can connect to other machines over the LAN if given an IP address). All other computers can connect fine and are running XP (except the Linux mail/file server). DHCP Service is on, tried resetting things with command prompt, system restore is a no-go because no restore points before this problem happened exist, re-installed network adapter, safe mode doesn't work, can't ping anything (all requests time out). In short, I'm stuck.