I got it to install and it worked the other day, but now it won't load. Keeps asking for permission to modify my computer (Win 7) for "Garmin Core Update Services." I said yes once and it just asks again and again and never loads.
Anyone continuing to have sync issues with the FR15, please delete the FR15 from Express and Connect, make sure Express is up to date then add the device again. I have been testing the FR10 and 15 here in the office and am not having any sync issues. Granted I do not have access to devices used on a daily basis so I am not subject to random creation of corrupt data responsible for sync errors. See the information in the FAQ: What should I do if I'm having issues with the Garmin Express client? If you continue to have trouble please contact Garmin Product Support