How old is your psu? What brand? Do you have a GPU? More info more info
Temps look ok, nothing out of the ordinary.
Can you send us the volarges from HWInfo?
You can check what computer logged why it shutdown in right click Start button->Event Viewer -> Windows logs -> System.
Due to lack of info it can be bad PSU, MOBO, Windows updates, and much much more.
This is the last event it was showing me
Log Name: System
Source: Microsoft-Windows-Kernel-Power
Date: 10/20/2019 7:16:10 PM
Event ID: 107
Task Category: (102)
Level: Information
Keywords: (1024),(64),(4)
User: N/A
Computer: DESKTOP-0D5BUM4
Description:
The system has resumed from sleep.
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>107</EventID>
<Version>1</Version>
<Level>4</Level>
<Task>102</Task>
<Opcode>0</Opcode>
<Keywords>0x8000000000000444</Keywords>
<TimeCreated SystemTime="2019-10-20T14:16:10.818588800Z" />
<EventRecordID>31078</EventRecordID>
<Correlation />
<Execution ProcessID="4" ThreadID="296" />
<Channel>System</Channel>
<Computer>DESKTOP-0D5BUM4</Computer>
<Security />
</System>
<EventData>
<Data Name="TargetState">4</Data>
<Data Name="EffectiveState">5</Data>
<Data Name="WakeFromState">5</Data>
<Data Name="ProgrammedWakeTimeAc">2019-11-02T20:28:36.000000000Z</Data>
<Data Name="ProgrammedWakeTimeDc">1601-01-01T00:00:00.000000000Z</Data>
<Data Name="WakeRequesterTypeAc">2</Data>
<Data Name="WakeRequesterTypeDc">0</Data>
</EventData>
</Event>