It doesn't happen every time but around 30% of the time when I launch Parallels Desktop 10.0.2 under 10.10 I end up waiting for well over a minute before my VMs start loading. I see a spinning indicator that says "Parallels Desktop" next to it, and that indicator stays open for an extended period before the VM window opens & loads as normal (in fact, that indicator is spinning IN FRONT of the web browser window I'm typing this in). Eventually the indicator goes away and my Guest OS window opens and loads. It doesn't appear to be VM specific as I'm seeing the same pattern with an Ubuntu Guest OS in addition to a Windows 7 Guest OS...
Hi Bobby, You can try (un)installing and (re)installing Parallels Desktop and check how it works. Also try running Repair Disk permission on the Mac Hard Drive. Thanks, Dhruba