Can't boot from SSD with my Windows install without secondary HDD

What is the brand and model of your 500GB NVME SSD ?

SIW2 said:

What is the brand and model of your 500GB NVME SSD ?

Crucial P1, just a cheapy.

Consider testing all of the drives:

1) Run HD Tune (free version) (all drives)
HD Tune website
Post images into the thread for results on these tabs:
a) Health
b) Benchmark
c) Full error scan


2) Run Sea Tools for Windows
long generic test
Post an image of the test result into the thread
SeaTools for Windows |
Seagate
How to use SeaTools for Windows | Seagate Support US

Open administrative command prompt and type or copy and paste:
chkdsk /r /v
This may take hours to run so plan to run overnight.
Run on all drives using the syntax: chkdsk /r /v C: or chkdsk /r /v D: changing the drive letter to the applicable drive.

C:\Windows\system32>chkdsk /r /v
The type of the file system is NTFS.
Cannot lock current drive.

Chkdsk cannot run because the volume is in use by another
process. Would you like to schedule this volume to be
checked the next time the system restarts? (Y/N)

Type: Y
reboot


3) Use the information in this link to find the chkdsk report in the event viewer. Copy and paste into notepad > save to desktop > post into the thread using one drive or drop box share link:
Read Chkdsk Log in Event Viewer in Windows 10 Windows 10 Performance Maintenance Tutorials
Read Chkdsk Log in Event Viewer in Windows 10