What could be causing my iMac Intel to reboot when I touch the mouse???

This problem has existed for most of the time we've had our Intel iMac since June 2006 and it's been worse recently. We'll come to the computer which has the screen dimmed and touch the mouse to make the screen wake and it just restarts. It's like the "wake from sleep" and "restart" are somehow wired together. It doesn't happen everytime and I thought it might be from SuperDuper because the iMac is generally connected to a GTech 500GB drive for daily backups. But, after unplugging the drive it's still happening. I'm not sure if there is software that can help me diagnose this problem as I've dealt with it before. I've done all the usuals like repair permissions, repair disk, ensure I have all the latest versions of software, rebuild desktop with Disk Warrior, optimize and repair with TechToolsPro, yadda, yadda, yadda. None of these has made any measurable difference in this randomly annoying problem that is just getting on my nerves enough to post on the discussions
Anyone have any thoughts about how to proceed evaluating this further or could point me to some suggestions on how to fix this? Thanks much!

I thought more about your issue after my last reply and the only other thing that came to mind was the logic board or power supply problem.
Try running the Apple Hardware Test, it may or may not find an intermittent power problem.
http://support.apple.com/kb/HT1509
Your best bet is to take the iMac in to your local Apple Service Provider or Apple Store and have them test it. If you purchased Apple Care with your iMac then all testing and repairs will be covered.

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    1. Ops - I DO instantiate it as follows:
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    [snip]
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    -----Original Message-----
    From: Attila R&aacute;cz [mailto:[email protected]]
    Sent: Thursday, 7 October 1999 14:35
    To: Haben, Dirk
    Subject: Re: (forte-users) What could have caused the
    StopWatch class to
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    Hi Dirk,
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    "Haben, Dirk" wrote:
    G'day
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    >>
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    For the archives, go to: http://lists.sageit.com/forte-users and use
    the login: forte and the password: archive. To unsubscribe, send in a new
    email the word: 'Unsubscribe' to:
    [email protected]
    Attila Racz Lufthansa
    Systems Hungary
    BUD LSYH
    E-mail: [email protected] .-``'.
    Tel.: (36 1) 431-2910 .` .' Mazsa ter 2-6.
    Fax : (36 1) 431-2977 _.-' '._ H-1107
    Budapest, Hungary

    Attila
    1. Ops - I DO instantiate it as follows:
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    -----Original Message-----
    From: Attila R&aacute;cz [mailto:[email protected]]
    Sent: Thursday, 7 October 1999 14:35
    To: Haben, Dirk
    Subject: Re: (forte-users) What could have caused the
    StopWatch class to
    return a negative v alue?
    Hi Dirk,
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    "Haben, Dirk" wrote:
    G'day
    Suppose the following output is produced:
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    NLM Startup is Complete - Partition's Locale is 'c'
    Loading partition CollectResponseStatistics_cl0_Client built on 30-Sep-1999
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    Attached to manager for node BLAH.
    %DiH-I-VERID: CollectResponseStatistics_v371.002
    %DiH-I-BGP, BGP Started...
    %DiH-I, Repeat Interval (in milliseconds) 300000
    %DiH-I, Sample Account Number: 123456
    %DiH-I-BGPSTART, BackgroundProcessing started at: 07-Oct-1999 08:54:16
    | Total Time | Account Fetch | Account Fetch |
    | in milliSeconds | Start Time | Completion Time |
    |-----------------|----------------------|----------------------|
    | -194 | 07-Oct-1999 08:54:16 | 07-Oct-1999 08:54:17 |
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    sw : StopWatch;
    //that line is actual as follows:
    sw : StopWatch = new;
    //*****[Dirk]
    >>
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    BP_t2 : DateTimeData = new;
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    Thanks,
    Dirk
    For the archives, go to: http://lists.sageit.com/forte-users and use
    the login: forte and the password: archive. To unsubscribe, send in a new
    email the word: 'Unsubscribe' to:
    [email protected]
    Attila Racz Lufthansa
    Systems Hungary
    BUD LSYH
    E-mail: [email protected] .-``'.
    Tel.: (36 1) 431-2910 .` .' Mazsa ter 2-6.
    Fax : (36 1) 431-2977 _.-' '._ H-1107
    Budapest, Hungary

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