Windows 10 - just type Reliability History or Event Viewer into the "Type here to search" box.
PSU is Power Supply Unit. You should be able to see the basic PSU information (make, model, wattage) on the outside labling.
Only, if necessary, open the desktop case. Do not attempt to take the PSU apart.
Be sure to power off and unplug the desktop before looking inside.
Here is what I have found out so far. Haven't had a chance to check PSU, but I did look at event log and here is the information I found: 2 items 1 critical and the other an error
Log Name: System
Source: Microsoft-Windows-Kernel-Power
Date: 12/10/2018 3:01:49 PM
Event ID: 41
Task Category: (63)
Level: Critical
Keywords: SQM,WDI Diag
User: SYSTEM
Computer: granbybc-PC
Description:
The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.
Event Xml:
<Event xmlns="
http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft-Windows-Kernel-Power" Guid="{331c3b3a-2005-44c2-ac5e-77220c37d6b4}" />
<EventID>41</EventID>
<Version>6</Version>
<Level>1</Level>
<Task>63</Task>
<Opcode>0</Opcode>
<Keywords>0x8000400000000002</Keywords>
<TimeCreated SystemTime="2018-12-10T22:01:49.229248600Z" />
<EventRecordID>1047</EventRecordID>
<Correlation />
<Execution ProcessID="4" ThreadID="8" />
<Channel>System</Channel>
<Computer>granbybc-PC</Computer>
<Security UserID="S-1-5-18" />
</System>
<EventData>
<Data Name="BugcheckCode">0</Data>
<Data Name="BugcheckParameter1">0x0</Data>
Log Name: System
Source: Microsoft-Windows-Kernel-Boot
Date: 12/10/2018 3:01:39 PM
Event ID: 29
Task Category: None
Level: Error
Keywords: Warning
User: SYSTEM
Computer: granbybc-PC
Description:
Windows failed fast startup with error status 0xC00000D4.
Event Xml:
<Event xmlns="
http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft-Windows-Kernel-Boot" Guid="{15ca44ff-4d7a-4baa-bba5-0998955e531e}" />
<EventID>29</EventID>
<Version>1</Version>
<Level>2</Level>
<Task>0</Task>
<Opcode>0</Opcode>
<Keywords>0x8000080000000000</Keywords>
<TimeCreated SystemTime="2018-12-10T22:01:39.762354200Z" />
<EventRecordID>1027</EventRecordID>
<Correlation />
<Execution ProcessID="4" ThreadID="8" />
<Channel>System</Channel>
<Computer>granbybc-PC</Computer>
<Security UserID="S-1-5-18" />
</System>
<EventData>
<Data Name="FailureStatus">3221225684</Data>
<Data Name="FailureMsg">A fatal error occurred processing the restoration data.
</Data>
</EventData>
</Event>
I don't know if any of this makes sense to you. It is all 'greek' to me. Any help would be greatly appreciated.
<Data Name="BugcheckParameter2">0x0</Data>
<Data Name="BugcheckParameter3">0x0</Data>
<Data Name="BugcheckParameter4">0x0</Data>
<Data Name="SleepInProgress">6</Data>
<Data Name="PowerButtonTimestamp">0</Data>
<Data Name="BootAppStatus">3221225684</Data>
<Data Name="Checkpoint">9</Data>
<Data Name="ConnectedStandbyInProgress">false</Data>
<Data Name="SystemSleepTransitionsToOn">3</Data>
<Data Name="CsEntryScenarioInstanceId">0</Data>
<Data Name="BugcheckInfoFromEFI">false</Data>
<Data Name="CheckpointStatus">0</Data>
</EventData>
</Event>