I installed the 829mb Apple software update on my 2011 Macbook Pro. Upon restart, it crashed. Error message: Panic CPU 0 caller 0xffffff800064ba7b Unable to find driver for this platform \"acpi"\\n"@/sourcecache/xnu/xnu-1699.26.8/iokit/kernel/10platfor
Panic CPU 0 caller 0xffffff800064ba7b Unable to find driver for this platform \"acpi"\\n"@/sourcecache/xnu/xnu-1699.26.8/iokit/kernel/10platform
Debugger called panic
Kernal uuid a8ed611fb0f-3729-8392-e7a32c5e7d74
THANKS FOR ANY HELP.
Boot into Recovery by holding down the key combination command-R at the startup chime. Release the keys when you see a gray screen with a spinning dial.
Note: You need an always-on Ethernet or Wi-Fi connection to the Internet to use Recovery. It won’t work with USB or PPPoE modems, or with networks that require any kind of authentication other than a WPA or WPA2 Personal password.
When the Mac OS X Utilities screen appears, follow the prompts to reinstall the Mac OS. You don't need to erase the boot volume, and you won't need your backup unless something goes wrong. If your Mac didn’t ship with Lion, you’ll need the Apple ID and password you used to upgrade, so make a note of those before you begin.
Don't install the Thunderbolt update -- it's defective.