Brock and I are familiar with Sandboxie (it's been around for quite a while). As it stands currently YTK Pro & Enhanced don't operate properly (by design) within virtual environments (such as VMware, Sandboxie, Virtual PC, VirtualBox etc) due to it's anti-cracking protection. This can be easily lifted and we plan on allowing YTK to run properly within any virtual environment you choose in the very near future.