Windows 11 reboots itself - Annoying!

My laptop turns on automatically AFTER it has been turned off. The laptop continues to reboot itself multiple times (I can hear it connecting & disconnecting as my bluetooth speaker announces every time my laptop switches on & off by itself). Ultimately the battery drains out. I am yet to find a fix for this, :( :(

The issue can be caused by many things, NOT just scheduled updates. In my case, I log on every morning to find that the PC has invariably rebooted overnight, and the cause is a system failure. Since the OP reported this happening every night as well, the original answer is on point, I believe.

If this happens to you, check your event viewer and look for warnings and errors under "administrative events." I can almost guarantee those of you who experience this daily will see events that are triggering the reboots, and it's almost always going to be due to 3rd party conflicts, permissions, etc.

I've done everything you wrote, and on the second night the pc restarted..

Maybe im missing something? Anything else besides what you wrote here? I haven't done anything written in the other post or in the links you provided

all I did was:

Edit Computer Configuration->Administrative Templates->Windows Components->Windows Update->Manage end user experience->Configure Automatic Updates

1. Set it to Enabled and 3 - Auto download and notify for install
2. Edit Computer Configuration->Administrative Templates->Windows Components->Windows Update->Legacy Policies->No auto-restart with logged on users for scheduled automatic updates installations
3. Set it to Enabled
   Should I also do what Henning Idsøe wrote, or anything else?

I initially did what Henning Idsøe posted, but I found that didn't work for me. With further investigation I came up with the steps I posted and it started working for me.

My steps modify the same setting that Henning Idsøe posted, so I don't think that step was necessary. I wish I had a better answer for you.