Post 10.4.11 update, iMac restarts 30min after shutdown

Hi everyone,
Sorry if someone else has posted this, but I couldn't find a similar problem on the forum.
Since updating a few days ago, my mac no longer stays permanently shutdown, but restarts itself around 30min after shutdown.
I have run the combo update, verified disk (no problems), verified and repaired permissions, checked all the energy saver preferences were correct etc., but the problem is still occurring.
Can anyone advise what might be done to remedy this?
Thanks very much.
Mike

What you are descrbing is a kernel panic, a good number of kernel panics are caused by bad RAM. Combined with your spontaneous reboots that sounds like it might be the issue. I'd get it on the bench somewhere (Apple Store, local reseller) and have the memory tested.
And no, random reboots and shutdowns are not typical.
iMac Core 2 Duo 2.16 gHz Mac OS X (10.4.8) | Apple BT Keyboard & MM | AE Base Station |

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The first step in dealing with a startup failure is to secure the data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since the last backup, you can skip this step.
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b. If Step 1a fails because of disk errors, and no other Mac is available, then you may be able to salvage some of your files by copying them in the Finder. If you already have an external drive with OS X installed, start up from it. Otherwise, if you have Internet access, follow the instructions on this page to prepare the external drive and install OS X on it. You'll use the Recovery installer, rather than downloading it from the App Store.
c. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, start the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
d. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.
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If the startup process stops at a blank gray screen with no Apple logo or spinning "daisy wheel," then the startup volume may be full. If you had previously seen warnings of low disk space, this is almost certainly the case. You might be able to start up in safe mode even though you can't start up normally. Otherwise, start up from an external drive, or else use the technique in Step 1b, 1c, or 1d to mount the internal drive and delete some files. According to Apple documentation, you need at least 9 GB of available space on the startup volume (as shown in the Finder Info window) for normal operation.
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Step 4
If a desktop Mac hangs at a plain gray screen with a movable cursor, the keyboard may not be recognized. Press and hold the button on the side of an Apple wireless keyboard to make it discoverable. If need be, replace or recharge the batteries. If you're using a USB keyboard connected to a hub, connect it to a built-in port.
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If there's a built-in optical drive, a disc may be stuck in it. Follow these instructions to eject it.
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Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to start up, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can start up now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.
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If you've started from an external storage device, make sure that the internal startup volume is selected in the Startup Disk pane of System Preferences.
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Safe mode is much slower to start and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
The login screen appears even if you usually log in automatically. You must know the login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
When you start up in safe mode, it's normal to see a dark gray progress bar on a light gray background. If the progress bar gets stuck for more than a few minutes, or if the system shuts down automatically while the progress bar is displayed, the startup volume is corrupt and the drive is probably malfunctioning. In that case, go to Step 11. If you ever have another problem with the drive, replace it immediately.
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Launch Disk Utility in Recovery mode (see Step 1.) Select the startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.
This is one of the rare situations in which you should also run Repair Permissions, ignoring the false warnings it may produce. Look for the line "Permissions repair complete" at the end of the output. Then restart as usual.
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If the startup device is an aftermarket SSD, it may need a firmware update and/or a forced "garbage collection." Instructions for doing this with a Crucial-branded SSD were posted here. Some of those instructions may apply to other brands of SSD, but you should check with the vendor's tech support.
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Reinstall the OS. If the Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
Step 11
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Step 12
This step applies only to models that have a logic-board ("PRAM") battery: all Mac Pro's and some others (not current models.) Both desktop and portable Macs used to have such a battery. The logic-board battery, if there is one, is separate from the main battery of a portable. A dead logic-board battery can cause a startup failure. Typically the failure will be preceded by loss of the settings for the startup disk and system clock. See the user manual for replacement instructions. You may have to take the machine to a service provider to have the battery replaced.
Step 13
If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.

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If you have more than one user account, you must be logged in as an administrator to carry out these instructions.
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
Select the most recent panic log under System Diagnostic Reports. Post the entire contents — the text, please, not a screenshot. In the interest of privacy, I suggest you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header and body of the report, if it’s present (it may not be.) Please don't post shutdownStall, spin, or hang reports.

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Hi Magsrobby,
Welcome to the forum and thanks for posting. I'm really sorry to hear you've had so many problems. I can look into this for you if you wish. Drop me an email with the details. You'll find the "contact us" form in the about me section of my profile. Once I have the details we'll take it from there.
Cheers
David
BTCare Community Mod
If we have asked you to email us with your details, please make sure you are logged in to the forum, otherwise you will not be able to see our ‘Contact Us’ link within our profiles.
We are sorry but we are unable to deal with service/account queries via the private message(PM) function so please don't PM your account info, we need to deal with this via our email account :-)

Dear Apple Support, Good day to you. This is to report the problem i encountered when i updated my Ipad mini to the new IOS 8.1.. After the update my Ipad restart and after that it appears a picture that need to connect to itunes and need to resto

Dear Apple Support,
Good day to you.
This is to report the problem i encountered when i updated my Ipad mini to the new IOS 8.1..
After the update my Ipad restart and after that it appears a picture that need to connect to itunes and need to restore. So i connect it to itunes and wait to restore my ipad mini because it is not opening.
After restoring it my ipad is now opening and it is like new that i need to set up again.
I set up again until i reach the apple id and password.
I put my below apple ID and password to unlock my ipad but it didn't work. The message i receive is "the apple ID cannot be used to unlock this Ipad.
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Thank you
Sent from my iPhone
Begin forwarded message:
From: Apple <[email protected]***>
Date: October 9, 2013 at 11:53:53 PM GMT+4
To: ****
Subject: Your Apple ID was used to sign in to iCloud and iMessage on an iPad mini
Dear Leslie J.,
Your Apple ID was used to sign in to iCloud and iMessage on an iPad mini named “Leslie Joye's iPad”.
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Apple Support
<Email Edited By Host>

1. It is never a good idea to include personal info like your email address or Apple ID in a post on an open forum.
2. The email you received DOES NOT say your Apple ID cannot be used to unlock this iPad. The email informs you that your Apple ID was used to unlock an iPad. Fortunately the iPad is yours. The message confirms that. If your Apple ID was used to unlock an iPad that was not yours your would then know to change your password. Since the iPad is yours you do not need to change your password.
Is your iPad working?

Post 10.4.11 update, iMac restarts 30min after shutdown

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