[SOLVED] W10 Boot issue

[sargan]

My PC is somewhat unreliable.
It is on latest W10 build 64 bit Version 1903 (build 18362.476)

When it starts up its fine and works OK .... no errors or issues.

Recently when I start it up ... it sometimes fails to start .... it's on an ASUS mobo ...
Sequence is typically

ASUS splash screen (with option to enter setup vis F2 etc)
Then I get screen with "RealTek PCI-E Gigabyte boot agent loading"
Then ASUS splash screen again
Next ... on a good startup is windows icon and it then continues to login
On the problem startup
Either the windows icon does not arrive - just sits with blank screen
or Windows icon arrives but it never proceeds any further.

Once it has failed once - it can take many restarts before it will work ..... once it does successfully start - usually fine for next few starts.
Fast Boot is disabled
I tried using W10 recovery ...
Settings > Update & Security >Recovery > Advanced Startup >Startup Repair
It reboots .. I login ... get the "Diagnosing your PC" mesage.
Then I get "Startup could not repair your PC"
and then states it has created a logfile on F:\windows\system32\logfiles\srt\strtrails.txt
F:\ is a DVD drive? ... with no disk so why it should think it is putting file there is strange.

The file is actually on C:\

Any suggestions on any W10 repair steps without a reinstall?

 

[SkyNetRising]

Check health of your storage devices. Use HDtune health, post screenshots.
Run checkdsk on C:

If you want to get rid of this one:
"RealTek PCI-E Gigabyte boot agent loading",
then disable network boot in BIOS.