in Device Manager first. If it does not show up there, try to reinstall. If it still is not there, try scan for new hardware. If it is on board, you might try to disable it in BIOS and reboot. Then reboot again and re-enable it and see if Device Manager can find it.
If it is in Device Manager to begin with, try this:
http://www.snapfiles.com/get/winsockxpfix.html
I have had this work after removing Ad Ware items.