First and foremost, are the COM ports recognized within Device Manager? Are they listing any conflicts or problems?<br><br>If they are listed in Device Manager, try deleting them and having Win2k attempt to automatically find them (search for new hardware).<br><br>If they are still not recognized or not in Device Manager, are there any devices in your computer using IRQ3/4 or IO 2f8/3f8? Are the COM ports setup within BIOS to use the standard IRQ/IO combinations? If not, are there other devices set up that are using the same IRQ or IO addresses?<br><br>What are you hooking up to the COM ports to check to see if they are working? If its a UPS, was it connected during the install of Win2k - I have heard there are some problems with UPS's and Win2k's setup program.<br><br>Have you checked the mother board manufacturer's web site for any updated BIOS or conflicts with Win2k?<br><br>Hope this helps a bit,<br>Paul Kincaid