Thanks Dan. I have an AP510 aprs tracker, and I can't connect to my Windows 10 laptop. I keep getting the message "mscomctl.ocx is missing or not registered". The files are in a file called VirtualBasic6-KB896559-v1-enu.exe. This will not load in Windows 10. I can't seem to find a mscomctl.ocx file that I can download and install manually on my laptop. I'm hoping someone would know where I can get this file.