Computer won't go into standby

[Todd]

"The device driver for the 'Communications Port (COM 1)
device is preventing the machine from entering standby.
Please close aa applications and try again. If the
problem persists, you may need to update the driver."

This is the message I get from the computer. I've tried
to find a newer version of serial.sys or serenum.sys but
have had no luck....any suggestions?

 

[Rajiv Das]

Have you got a legacy device plugged in COM1?