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Seems to me the power supply or UPS is faulty ? Whats the make and model, is there management agents installed to monitor this ?
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Seems to me the power supply or UPS is faulty ? Whats the make and model, is there management agents installed to monitor this ?

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Thanks for your reply.<br />
The Server is HP Proliant 110 - G6 - i3 Processor -New 
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Thanks for your reply.
The Server is HP Proliant 110 - G6 - i3 Processor -New

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I have newly implemented server that is shutting / &nbsp;locking up every 2 to 3 times a day. I can hear the fans - But it's frozen totally. Only way I can get it to reboot is powering up manually. <br />
&nbsp;looked up on the event log : The following error appears :<br />
The System Rebooted without cleaning - shutting down first - Lost Power unexpectedly<br />
&nbsp;- Kernal - Power - Kernal 51<br />
Reason Code 0xa000000<br />
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<pre><code id="code-8243598">Removed the &quot;Plesk&quot;, &quot;Server Applications&quot;,
&quot;Microsoft Applications&quot; and &quot;Linux&quot; Zones,
and replaced them with the &quot;Computer Servers&quot;,
&quot;M$ OS&quot;, &quot;M$ Server&quot; and &quot;Windows Server 2008&quot; Zones.

rindi,
EE Zone Advisor</code></pre>
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I have newly implemented server that is shutting /  locking up every 2 to 3 times a day. I can hear the fans - But it's frozen totally. Only way I can get it to reboot is powering up manually. 
 looked up on the event log : The following error appears :
The System Rebooted without cleaning - shutting down first - Lost Power unexpectedly
 - Kernal - Power - Kernal 51
Reason Code 0xa000000


Windows Server 2008 shuts down  with following error Code 0xa000000

Servers are computing devices that are similar to desktop computers in that they have the same basic components, but are significantly different in size, configuration and purpose. Servers are usually accessed over a network, and many run unattended, without a computer monitor, input device, audio hardware or USB interfaces. Many servers do not have a graphical user interface (GUI), and are configured and managed remotely. Servers typically include hardware redundancy such as dual power supplies, RAID disk systems, and ECC memory, along with extensive pre-boot memory testing and verification. Critical components might be hot swappable, and to guard against overheating, servers might have more powerful fans or use water cooling.

Server Hardware

The Microsoft Legacy Operating System topic includes legacy versions of Microsoft operating systems prior to Windows 2000: All versions of MS-DOS and other versions developed for specific manufacturers and Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions, and Windows Mobile.

Microsoft Legacy OS

The Microsoft Server topic includes all of the legacy versions of the operating system, including the Windows NT 3.1, NT 3.5, NT 4.0 and Windows 2000 and Windows Home Server versions.

Microsoft Server OS

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.