Hp 450 g3 keeps shutting down without warning

[Wealthy]

No error message

[Dragon-Fur]

@Wealthy 

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@Wealthy wrote:

No error message

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And, unfortunately, no context, that is, no way to guess what is going on.

You can certainly narrow the possible issues.  For example, you can test the hardware, test the software, take a look at any errors (in the Event Viewer, for example).  

There are many underlying causes that can cause the computer to shut down.

I did not find a computer model  "HP Pavilion 450 G3"

There is a mid-level "Probook" business class model that is similarly named:

HP ProBook 450 G3 Notebook PC

Candidates that cause shut-down include  (not a complete list):

• Heat - caused by faulty hardware or dirt/dust in the vents and interior of the computer
• Bad / Failing disk 
• Operating System - File System corruption ("Windows" is corrupted / bad / having trouble)  - file system errors
• Malware / Virus infestation
• One (or even more than one) bad software / program that is corrupted / incompatible

It is impossible for you to diagnose unless you know a bit more about what is happening.

Suggestions include:

• Make sure Windows Updates is current 
• Make sure your computer software / drivers are up-to-date
• Check the "startup" software list to make sure the software that is starting when you boot / log in is actually software you want started when you boot / log in.  What?  Not every program needs to run every time you log into the the computer - some software should only be started manually and when you want to use it.
• Run File System checks - see if Windows is aware of any errors / problems
• Run Hardware Diagnostics - check at least the CPU / memory / disk(s) 
• Run your security software filter / scans to detect and remove problem files / software
• Less likely, perhaps worth checking:  Other devices on your network that are interfering with your computer / network connection.  This requires that you understand your network and how to manage the router and the various devices that you connect to that network.  Not sure?  Switch off "other devices" and "just see what  happens".

For example - some of the tools and software to be considered include:

Overheating

HP Notebook PCs - Reducing Heat Inside the Laptop to Prevent Overheating

Check-Disk > File System and Disk Errors

READ, read, read - then use.

Microsoft document: chkdsk

There are hundreds of articles on the 'net dedicated to "chkdsk".  Use your favorite search engine to find an article that meets your needs and skill level.

and

READ, read, read - then use.

How to Repair Windows 10 Image using DISM

Option 3  ( Check only )

In the elevated command prompt, copy and paste the command below, press Enter, and go to step 8 below. (see screenshot in article)

Command example
Dism /Online /Cleanup-Image /CheckHealth

Run Component Tests

Clear, concise, well written article - Contributed by  Wes_notebooks 

Testing for Hardware Failures

HP PCs and Tablets - About UEFI and the Startup Menu

Magic and skill > Event Viewer

Lesson 3: Using Event Viewer to Troubleshoot Problems

Event Viewer in Windows

How-To Geek > Lesson 3: Using Event Viewer to Troubleshoot Problems

How to Create Your Own Windows Event Log Notification System

Information at a glance > Reliability Report

How to use Windows 10’s Reliability Monitor to fix and fine-tune your PC

How to Troubleshoot Windows 10 with Reliability Monitor

Reliability Monitor is the Best Windows Troubleshooting Tool You Aren’t Using

Reference and Resources – Places to find help and learn about your Device

Clarification of terms and "what the device can do" (Specifications)

Device Homepage

NOTE:  Content depends on device type and Operating System

HP Drivers / Software and BIOS, How-to Videos, Bulletins/Notices, How-to Documents, Troubleshooting, User Guides, Service and Maintenance Guide (Replacement Parts and Procedures), Product Information (Specifications), more

Open Support Home

Enter the name of your device

When the website support page opens, Select (as available) a Category > Topic > Subtopic

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