I finally got the upgrade to complete successfully; I had not originally read the troubleshooting guide about canceling all the "found new hardware" prompts, but after trying to force it manually it finally went through the complete cycle of logging in automatically to the helper profile, installing the parallels tools, and rebooting a few times to complete it. But now, I'm noticing that the VM is extremely slow. I'm running: MacOS 10.5.5 Parallels 4 upgraded from 3 MacBook Pro 2.2GHz Intel Core Duo 4GB RAM 1 internal 120GB HD Not running bootcamp, booting from hard drive image The performance of the mouse and keyboard are fine, it's just taking a really long time to launch applications. Reboot takes forever before everything is loaded. I even tried increasing to 2.5GB RAM allocated to the VM, as well as two CPUs, and have tried hypervisor on and off. Nothing is taking up a lot of CPU in the windows task manager, it's just really slow. Any ideas?