My iMac will boot, but loses contact with BlueTooth

My iMac will boot, but loses contact with Bluetooth after logging in, and then there is no way to interact with the system. I can only shut it down. Any help in resolving this issue will really be appreciated.
Thanks -
Dudley Warner

Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, by a peripheral device, or by corruption of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode and log in to the account with the problem. Note: If FileVault is enabled, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including sound output and Wi-Fi on certain iMacs. The next normal boot may also be somewhat slow.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin. Test while in safe mode. Same problem? After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of the test.

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[I got a black screen telling me I had to reboot in many languages, what was it?|http://www.dslreports.com/faq/4970] Also has detailed description of what happens during a KP.
[Apple docs: What's a kernel panic? (Mac OS X)|http://docs.info.apple.com/article.html?artnum=106227]
[Topic : kmosx: Kernel Panics? Don't panic too !|http://discussions.apple.com/thread.jspa?threadID=121923]
[X-Lab: Resolving Kernel Panics|http://www.thexlab.com/faqs/kernelpanics.html]
[Tutorial: Avoiding and eliminating Kernel panics|http://www.macfixit.com/article.php?story=20060911080447777]
[Tutorial: An introduction to reading Mac OS X crash reports|http://www.macfixit.com/article.php?story=20060309075929717]
[12-Step Program to Isolate Freezes and/or Kernel Panics|http://macosg.com/group/viewtopic.php?t=800]
[Texas Mac Man's post on kernel panics|http://discussions.apple.com/thread.jspa?threadID=1723768&tstart=0]
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My iMac will boot, but loses contact with BlueTooth

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