It seems such a trivial thing, but it's driving me absolutely batty. I installed Parallels 10 (running the trial version) on my Mac. I've got Yosemite 10.10.2, running Windows 8.1 with Parallels. I like the performance of it, except for one very very very annoying 'glitch'. Every time I click on the Windows window, I get a very loud beep. It makes me cringe, and it's the only thing keeping me from purchasing the full license to Parallels. I want to use the Windows environment for gaming, since my options for the Mac are limited (I like action/adventure RPG, hack-n-slash, platform, puzzlers, etc). The only way I've been able to get the beep to stop is to mute Parallels, which negates the whole reason for using it in the first place (can't really play games with no sound). I've tried posting in the Parallels forum, and got one response telling me to set a bootflag of "devices.audio.clock=1" but that didn't work. I find it hard to believe that this is a normal function of Parallels, it seems like people would've complained about it before. But then again, maybe I'm not very tolerant. And I've tried VMWare Fusion, and the performance was so awful, I know there is no way I can play any good game on it (I couldn't even run The Talos Principle without it stuttering every 3 steps, ugh). It sucked because I liked VMWare's user interface better than Parallels', but the poor performance is a deal breaker. I've got an 4.3GHz (OC) Intel i7-4790k quad-core processor, GeForce GTX760 4GB video card, and 8GB of memory (will probably upgrade to 16GB soon), all running on a Gigabyte G1 Gaming 7 motherboard, so I know the VMWare Fusion issue isn't with my setup, my benchmarks are off the charts. I'm just really annoyed with this beep. PS - I don't want to do Bootcamp. I'd like to be able to have the VM thing fixed. I don't want to have to reboot every time I want to start Windows, plus I don't want to have to again create a new partition on my 4TB storage drive because I have backups already on it and wiping it to create a new partition just isn't going to happen. (My Mac OS is on a 256GB SSD) Any ideas out there? Thanks.