I replaced the HD on my M52 8212 Think Center after the old one crashed loaded the XP Pro OS and now have no internet access. I have ? for all items in the Device Manager Other Devices folder. Will not recognize the CAT5 cable is pluged in and I have no sound. I looked up drivers on the Lenovo site and am not sure which download I need. I have no NIC installed and need just the MB network drivers. Which file should I install?