Random reboots and "Invalid System Disk" message

I wasn't sure where this goes so I'm posting in General. My W10 machine, which I built right after Christmas 2018, is having random reboot issues that I can't figure out. At random times the machine will reboot, and then show a black screen with the message "Invalid System Disk. Replace the Disk and Press Any Key". Pressing a key then boots W10 normally.

It's starting to become an issue because it happened last night while my son was in the middle of his distance virtual learning school work, causing him to have to re-enter answers to several questions.

I have perused the Event Logs after one of these random reboots, but I can't really seem to find anything useful that would indicate would might cause the machine to reboot. And why would it say "Invalid System Disk" and yet still boot normally?

Actually it may have USB set as a boot device before the internal nVME SSD, which would explain the Invalid System Disk if my son's school flash drive is in the machine when it boots. But that still doesn't explain the random reboots the machine is doing.

At one time I thought the power supply might be an issue, because I built the machine with a PSU from a previous build. I replaced the power supply a few months ago, but obviously that wasn't the cause because it's still happening. So aside from checking the boot order in BIOS, anything else I might check that would explain these random reboots?

Machine is currently on Win10 Pro 1909.

Run V2 > upload results directly into this thread
BSOD - Posting Instructions

zbook said:

Run V2 > upload results directly into this thread
BSOD - Posting Instructions

even though I'm not getting any BSOD's?

I'll have to do this later tonight and report back.

It will collect logs used for troubleshooting:
msinfo32, dxiag, event viewer, etc.

Finally got a chance to run the V2 utility. I checked boot order and one of my other external USB hard drives was set before my internal drive, so that's what was causing the Invalid System Disk error. But it still doesn't explain the random reboots. I checked errors in event log, and it's randomly rebooted over 50 times since the month of June. I can't find any indication why, it only tells me that it didn't shut down cleanly.

1) Update the specs in the "My Computer" section:

System Specs - Fill in at Ten Forums
In the left corner below in your post you find 'My System Specs'.
After clicking it you can find a link a little below that says 'Update your System Spec', click on this link to get to the page where you can fill in your system specs.
System Info - See Your System Specs - Windows 7 Help Forums

Include PSU. cooler, case, peripherals and anything attached to the computer by wired or wireless (mouse, keyboard, headset, printer, xbox, USB wireless network card, etc.)


2) Run tuneup.bat
Batch files for use in BSOD debugging



3) The BIOS: Version/Date American Megatrends Inc. P3.50, 7/18/2019

Upgrade the BIOS to the most up to date non-beta BIOS
ASRock > B450 Pro4

4) Indicate the warranty status of the components

5) Indicate the components available for swap testing

6) Open administrative Powershell > copy and paste this Powershell script > click OK > post a share link into this thread
Windowsupgradetroubleshooting.ps1

7) In the left lower corner search type: system or system control > open system control panel > on the left pane click advanced system settings

a) > on the advanced tab under startup and recovery > click settings > post an image of the startup and recovery window into the thread

b) > on the advanced tab under performance > click on settings > on the performance options window > click on the advanced tab > under virtual memory > click on change > post an image of the virtual memory window into the thread

8) Run Memtest86 version 8.4 (or newer version if available) for four passes.
Repeat the test so that eight passes are performed.

MemTest86 - Official Site of the x86 Memory Testing Tool

Use a camera or smart phone camera to take pictures and post images into the thread.
In case there are any problems uploading images use share links (one drive, drop box, or google drive)

Memtest86 has a feature to produce a text report.
Please post this in addition to the images.

WMIC is a command-line interface that lets you perform many administrative tasks, including checking hard disk health. It uses the S.M.A.R.T (Self-Monitoring, Analysis and Reporting Technology) feature of hard disks to see status and provide a simple conclusion, like “OK” or “Pred Fail,” etc. It is still a very basic command that offers very little information, but it is quick and a built-in feature of Windows.

To check a hard disk S.M.A.R.T health report status please follow below instructions:

1. Open the Command Prompt from Windows Recovery Environment

2. Type following command and press Enter key.

wmic diskdrive get status



You will see the status of your hard disk after a short delay. Windows will report S.M.A.R.T health status for all connected hard disks, in my case i have three hard disk connected that is the reason i get three OK S.M.A.R.T health report status.

Sorry folks for the delay, I finally had a chance to get all the info together last night right after a random reboot happened.

System info (2nd system) updated. Tuneup output attached.

Warranty? likely none. Don't really have any components that I can swap out I don't think. My old version of this build was a core i5 processor and motherboard.

WindowsUpgradeTroubleshooting script result: ShareFile




MemTest results attached. Had no idea it would take 8 hours to run, so I haven't run it a 2nd time yet.

First scannow:

Code:

Windows Resource Protection found corrupt files and successfully repaired them.

Second scannow:

Code:

Windows Resource Protection did not find any integrity violations.

When available update the progress with the steps in post #7.

One Memtest86 with 4 passes = pass
When available post images and text report for the second test of 4 passes.