Hello. I have a Mac-Mini Intel Core 2 Duo running OSX 10.6.3. Upon rebooting the machine wont load to the desktop and simply hangs on the spinning wheel under the silver apple. Before the machine was rebooted there was a system message that said, " System extension cannot be used The system extension "/System/Library/Extensions/AppleBluetoothHIDKeyboard.kext" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update." I have never seen this message before and now the machine won't boot passed that load screen. I have run Disk Utility from the install DVD and did a repair permissions and a repair disk and they both came back clean. I also attempted to boot from "safe mode" and that hung on that load screen as well. Any help would be most appreciated. Thank you.