Setup: GREEN PC = Server = Window 7 x64 - Synergy 1.3.1 | YELLOW PC = Client = Windows 7 x64 - Synergy 1.4.3 | RED PC = Client = Windows XP x86 - Synergy 1.3.7
Issue: Green was running Windows Vista x64 and I reinstalled to upgrade to Win 7. I installed v1.4.3 But found the new interface was unable to align my screens correctly. So I down graded to v1.3.7. I set up the layout how I wanted, tested, and everything works correctly. (This is after setting it to run on Administrator privileges). I closed and relaunched the server to make sure everything was good. I set it up to START when Windows starts. And Rebooted Green.
Watching the LOG OUTPUTS on both RED and YELLOW. I saw both of the connect to GREEN on reboot. But when Windows completed its startup. There was NO icon in the task bar. Nor could I move my mouse around from GREEN to YELLOW or RED.
I went thought the process of removing the Auto Start on Computer, and installed the Auto Start on Login option. Same exact result. No Icon, and unable to go to other screens.
I had this same problem with my YELLOW computer after a windows Update. I upgraded it to v1.4.3 to try and solve this issue, but it too fails to auto start. Here is a list of the recent updates that May of caused this issue.