I am a new PIC user and I am using the ICD with a PIC 16F877. I am running MPLAB ver. 5.62.00 and Windows 2000. Everything works fine if I am running under an administrator account. However, if I log off that account and log onto a "power user" account, I cannot establish serial communications between the PC and the ICD. I do not change any connections or settings when I log off one account and log onto the other. I have checked the COM1 settings under both accounts and in each case I have the COM1 flow control set to hardware and FIFO is off. Microchip tech support tells me that the serial connection should work under any account. Any ideas on what to do? Thanks, Richard Goldberg Dept. of Biomedical Engineering Univ. of North Carolina -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads