win 11 does not install

[mirko-pi]

Hi, I have a HP Pavilion 595-p0004nl desktop.
It lets me download and install win 11, but then when I restart it cancels everything and goes back to win 10. Help thanks

[BeemerBiker]

Make sure your system passes UEFI diagnostics

Tap the ESC key after powering on. Tap it once a second after you see the LEDs on the keyboard flash. When you see the startup menu, press F2 to run diagnostics.

Bring up the windows event viewer and look through the system log for errors relating to the windows 11 upgrade failure.

As discussed here, I had to remove the following apps before the upgrade worked.

What I removed from the windows 10 startup.  I was not sure exactly what might be causing the problem so I took out anything I thought I could do without

All apple stuff:  itunes, icloud (all 5 of them), apowermirror
All HP (several printer update apps)
All Acronis (3)
All Adobe (3)
DVDFab, Garmin, Gridcoin, Java, Github, Google drive, Cortana

What I uninstalled

PrimoCache, 
Intel iaStore  HDC and also the SCSI but the ones dated 2017,
  but not the ones dated 2018.  I assume these are needed???
Intel rapid store technology. Not used and AHCI is enabled not RST
  in my BIOS

What I should have uninstalled 

All NVidia drivers for my RTX2080 as the win11 took then out completely after a lot of error messages

I had to remove xbox as it was giving an error even though I did not have xbox.  Also, if an app veto's shutdown you need to uninstall the app.

[Paul_Tikkanen]

Hi, @mirko-pi 

The problem is most likely related to your PC's Secure boot state being disabled (Stato avvio protteto - Disattivato).

Go into your PC's BIOS, enable secure boot, and try installing W11 again.

Having secure boot enabled is a requirement to support W11 on a PC such as yours that fully meets Microsoft's minimum W11 hardware requirements.