>>On a Thinkpad P155, by default, COM1 is not enabled. COM2 is and this is the bus mouse port. However, the other connector for COM2 port is not enabled. The Settings - Control Panel - System - Devices - Ports option shows COM2 enable and LPT1. COM1 is not. How do we enable that on Thinkpad P155?
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>THis is a SWAG, but I'd expect that it's an issue with the BIOS setup rather than a WIndows setting - try going into the BIOS setup befre Windows starts to assign default ports. You also are dealing with a PCCard environment; you may not have the luxury of a standard COM1: device assignment; I know that my AST laptop has COM2: for its COM port connector, and places the built-in modem at COM5: by deafault; this doesn't cause any problem in itself with normal operation, but trying to force port assignments cause mondo headaches with PCCard device integration, especailly some NICs.

Is it possible there is no indication to access the BIOS at boot time? I don't remember having seen such an option at boot time.