Hello, I am running Lady Heather 5.0 on my Win 7 PC, connected to an HP 58503A through a dedicated hardware serial port. Everything seems to be working and updating as it should, EXCEPT every minute at the 33 second mark, the window freezes and nothing updates until the 37 second mark, then everything updates once a second as it should until the next 33 second mark. I've looked at the Win 7 clock and run SatStat, and both count smoothly and update every second. I'm hoping it's just a configuration issue with LH, but I'm not sure. Everything else about LH seems to be working as it should. Any ideas? Thanks, Stan