It sounds to me that something else has taken posession of COM1 before you start hyperterminal. Have a look at control panel/system/device manager to see if any device (properties) thinks it already owns COM1 Bye. -----Original Message----- From: Heinz Czychun [mailto:hgczyc@REACH.NET] Sent: Tuesday, 7 March 2000 6:38 To: PICLIST@MITVMA.MIT.EDU Subject: [OT] Trouble with Win98 & Hyperterminal Hi all, Sorry for the ot, but I am trying to get this working to talk to a PIC. I am inpressed with win98's ability to install, and uninstall itself smoothly, but I wish I didn't have to uninstall it. My question, has anyone else had problems, getting hyperterminal to work after installing windows98 ? It gives me an error that it can't open COM1, although this was/is working under windows 95. Any suggestions would be greatly appreciated.