Just upgraded from Parallels 9 to v10 as part of the 20% off offer and because I'm on Yosemite, so I thought I'd take advantage of the new features and performance upgrades. I have a bootcamp partition, which I use for gaming and Visual Studio, which I have setup to run as a VM in parallels too- this has always worked great for me historically. Upon installing Parallels 10 the parallel tools were upgraded and the vm rebooted and since then - no mouse - no pointer, no control. I tried changing the settings as per http://kb.parallels.com/en/115306, to no effect. Uninstalling parallels tools fixes the issue, but then leaves me with fewer features than I had on v9! No great for an upgrade! Removed Bootcamp VM and re-added to no avail. I'm on a 2012 MBPr with 16GB RAM and Parallels v10.2.1. Bootcamp VM is set to 4 cores and using 8GB RAM running Win 8.1 with all updates. Any thoughts?