I've consistently gotten super-fast boots in Windows 7 in my Parallels virtual machine, less than 5 seconds from power on to login screen. I'm curious - did Microsoft's boot optimizations really help THAT much? Some stats about my VM: It has 1GB of RAM, a 160GB HDD, and 256MB of VRAM. My Mac has 4GB RAM and a 1TB HDD (both upgraded from the original specifications it came with). EDIT: For comparison purposes, Vista takes about 10-15 seconds to boot, and XP boots in 15-20 seconds. All 3 virtual machines have the same specifications hardware-wise.