My update:

Reading postings of others dated earlier, I follow the advice of checking
off the Automatically Restart option in Control Panel>System>Advanced System
Setting>Startup and Recovery>System failure.

I guess that Vista will not reboot the next time when ATI Graphics driver
issue occurs. If this works, then the difficulties of this involuntary
rebooting or the Blue Screen of Death display that were seen in Windows 95
and Windows 98 would be greatly alleviated.

"Ren" <lirenchan******.com> wrote in message
news:en9z59lyHHA.4652@TK2MSFTNGP05.phx.gbl...
>I encountered this involuntary rebooting issue everyday since I upgraded,
>on July 10, 2007, my Dell Latitude D810 notebook PC from Windows XP Pro SP2
>to Windows Vista Business edition. Vista's Problem Reporting log keeps
>stating its cause as ATI Graphics driver error.
>
> The video card in Dell D810 is ATI Radeon X600 with 128 MB memory on the
> card. Installing ATI's adapter driver suite named Catalyst Software Suite
> for Vista 32-bit does not stop the involuntary rebooting issue.
>
> Dell's technical support said that Dell does not have the driver for Vista
> yet as of July 18, 2007.
>
> Thanks for your comments that might lead a solution.
>
>
> "bradleywold" <bgw953@duscussion.microfoft.com> wrote in message
> news:20947E2D-AD97-4306-A7CB-2E520CA12A43@microsoft.com...
>>I have an annoying problem with my Windows Vista desktop for the last
>>month.
>> Every once in a while, the computer will shut down automatically, and
>> start
>> up on its own, if I don't prompt it after 15 seconds. It will do this at
>> any
>> time it feels like it. I don't know why it is doing this. The computer
>> is a
>> Gateway desktop. I have call them a few times about this problem, but
>> the
>> solutions are to no avail. It probably started when I put in a few
>> application programs in after about a week I got the computer, sometime
>> in
>> May. I have Vista Home Premium. I am running Avast Home Edition as my
>> anti-virus program. And I am running Spy-Sweeper from MSN. Recently, I
>> have
>> downloaded and used A-Squared.
>> I have done a System Restore, but that didn't work. Nothing seems to
>> work.
>> I am not a computer knowledgeable person, but I got a feeling that it
>> might
>> be a safe-guard against something, or something that is runnig in the
>> background.
>> Anyone experience this, or have any ideas what I can do to remedy this
>> problem?
>> Thanks!
>> Brad
>