After booting into the Snow Leopard Install DVD to verify my hard drive and then switching back to my hard drive to quit the Installer, and now I'm having trouble with my peripherals. On startup, my Magic Trackpad and Aluminum Wireless Keyboard have a 15-20 second delay after boot to desktop before turning on and working. I've added them to my favorites in Bluetooth preferences, changed the batteries, turned on and off, deleting Bluetooth and peripheral preference files, reset SMC and PRAM, deleted/re-paired trackpad from the computer, and even restored to an earlier backup with Time Machine to no avail. It's worth noting that when I turn off the Trackpad and startup using just the keyboard and my old Magic Mouse, it works with no delay. What can I do? It's pretty annoying.