Intel iMac - System crashes when switching users

Hi all,
Having a very frustrating problem with my iMac. About 50% of the time, when I use fast user switching to move between accounts, my iMac crashes. The screen goes dark, and advises me that I need to restart. The error also occurs when I log out of an account completely, and log into a different account, again about 50% of the time.
I have restored the computer completely, which is, I'm told, supposed to eliminate any software issues, so am I dealing with a hardware issue here?
I'm at a total loss. Any help would be greatly appreciated.
24'' iMac
Intel Core 2 Duo 2.93GHz
4GB RAM
ATI Radeon HD 4850 512MB Video Card
1 TB HD

HI,
*"The screen goes dark, and advises me that I need to restart. "*
What you are experiencing is called a, "kernel panic". Go here for information to Resolve kernel panics
Also, go to System Preferences/Accounts and make sure there aren't any apps listed there to launch on boot.
While you have the System Preferences/Account pane open make sure Enable fast user switching is selected, then click the gold icon padlock (you will be prompted for the admin password) to lock it and Quit System Preferences.
Carolyn

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Time:                       12:03:36 AM
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Time:                       11:58:43 PM
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The machine-default permission settings do not grant Local Activation permission for the COM Server application with CLSID
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0000: 53 79 73 74 65 6d 20 45   System E
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0010: 72 6f 72 20 63 6f 64 65   ror code
0018: 20 31 30 30 30 30 30 64    100000d
0020: 31 20 20 50 61 72 61 6d   1 Param
0028: 65 74 65 72 73 20 30 30   eters 00
0030: 61 38 63 33 36 65 2c 20   a8c36e,
0038: 30 30 30 30 30 30 30 32   00000002
0040: 2c 20 30 30 30 30 30 30   , 000000
0048: 30 31 2c 20 38 61 35 34   01, 8a54
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read my reply
Date: Thu, 30 May 2013 20:27:49 -0700
From: [email protected]
To: [email protected]
Subject: dreamweaver cs6 crashes when switching from design to live view
    Re: dreamweaver cs6 crashes when switching from design to live view
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     Please note that the Adobe Forums do not accept email attachments. If you want to embed a screen image in your message please visit the thread in the forum to embed the image at http://forums.adobe.com/message/5367198#5367198
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     Start a new discussion in Dreamweaver by email or at Adobe Community
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Dreamweaver cs6 crashes when switching from design to live view

dreamweaver cs6 crashes when switching from design to live view

read my reply
Date: Thu, 30 May 2013 20:27:49 -0700
From: [email protected]
To: [email protected]
Subject: dreamweaver cs6 crashes when switching from design to live view
    Re: dreamweaver cs6 crashes when switching from design to live view
    created by Preran in Dreamweaver - View the full discussion
Hi,
Can you try the solutions mentioned in this document?
http://helpx.adobe.com/dreamweaver/kb/crash-live-view-dreamweaver-cs5. html
Thanks,
Preran
     Please note that the Adobe Forums do not accept email attachments. If you want to embed a screen image in your message please visit the thread in the forum to embed the image at http://forums.adobe.com/message/5367198#5367198
     Replies to this message go to everyone subscribed to this thread, not directly to the person who posted the message. To post a reply, either reply to this email or visit the message page: http://forums.adobe.com/message/5367198#5367198
     To unsubscribe from this thread, please visit the message page at http://forums.adobe.com/message/5367198#5367198. In the Actions box on the right, click the Stop Email Notifications link.
     Start a new discussion in Dreamweaver by email or at Adobe Community
For more information about maintaining your forum email notifications please go to http://forums.adobe.com/message/2936746#2936746.

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Intel iMac - System crashes when switching users

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