From this post in the forum:
Delete the file called /System/Library/Extension.kextcache
Delete the folder called /System/Library/Caches/com.apple.kernalcaches/
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Sometimes, by searching first, you can find the answers right away as opposed to having to wait for one of us to help. In this case, you'd just search for "device not configured" and get a whole bunch o results that can help you.