I migrated from a PC running Windows 98 SE (where I successfully used Logbook of the World) to a PC running Windows 2000. Also, my certificate was expiring so I obtained a new one. I can't "load" the new certificate in TQSLCert-- I get "System Error: Permission denied". The ARRL's LotW support people say that that message is originated in Windows 2000 and not in the LotW software, so they can't help me. I've been running the new machine since August and have run many, many apps with no problem. Anybody seen this problem? Thanks in advance! 73 de W3GERry P.S. I successfully uploaded a log file by firing up the old computer (which I still have) and moving the log file and the new certificate over to it and loading the new certificate there.