Weird D/C

For some reason, whenever I log in after 20 seconds of playing I D/C its happened to me every time for the last 20 times. I just came back to playing MS and I haven't even had a chance to kill any monsters. And after I D/C it says "error code: 10093 (Either the application has not called WSAStartup, or WSAStartup has failed.)

Am I missing something here? Some kinda plug-in or something...? Help