This is my first post, so please excuse any errors in protocol . I'd like to report what seem to be some bugs running Orbiter 2010 with Windows 10. I'm running a Dell Inspiron 7547 with Core i7 and Windows 10 64 bit. 1TB of disk drive and 8G memory. In general, Orbiter 2010 runs pretty well - here are a few exceptions. 1. Some of the time, when I exit the home screen, I have to open TaskMgr to really[/I} close it or I get EM "Orbiter is already running". 2. If I open a secondary information window such as [CTRL] [ESC, or F1 or I etc.] I can't close the window. I have to quit the program and restart. 3. I can't access any transfer orbit window except to the Moon. I tried Mars and Saturn, but nothing happens. I do not remember encountering any of these problems in the past, although I haven't used Orbiter for quite a while - probably not since Windows 7. Any suggestions would be appreciated.