windows 11 crash

My Windows 11 crashed last week with a security violation black screen
I discovered that "Secure Boot" had been enabled in UEFI
I cleared this to disabled and it went ok for a while
I reinstalled Win11 a week ago with Rufus install and it has just crashed with the same fault
I have modifield the local group policy to stop windows updates to drivers
Has anyone had success with this action

Welcome to the forum. If your question is "has anyone had success with not including driver updates with windows update" then my answer is yes. I have never let WU manage my drivers. I manage all my own driver updates. I used option 2 and it has worked for me since 2021. Enable or Disable Include Drivers with Windows Updates in Windows 11

As far as windows crashing, you have not given any info about these crashes, nor have you fully completed the "system specs" section in your forum profile...We have no idea what hardware you are working with. May be driver related, maybe not. It can just as easily be hardware or firmware.

Gather the necessary log files, put them in one folder, zip the folder and upload zipped folder to any cloud provider. Provide a SHARE link to the zipped file here and @zbook can look at them.