Hello!
Today 6:23 AM I made the upgrade to Window 11.
Now, I am greeted with grub rescue: unknown filesystem.
Aaaahhhh… does Microsoft learn this finally.
I tried to boot with Ventoy (version 1.1.07).
But the UEFI bios does not detect the boot stick.
I want to find out, what the upgrade made on the SSD.
What different boot media (Unetboot,…) should I try.
Check the settings in BIOS. Things like Secure Boot etc.
What I have done so far: UEFI Bios clear secure boot. Now the stick boots.
But secure boot was empty.
So the issue is resolved?
I have booted the USB stick and now I am stuck at arch-chroot.
Why would you even install Window 11? 
It’s Spyware! 
And full of buggs.
Edit: fixed typ-O
The support of Windows 10 ends october 14, 2025.
So ? There are better ways 
Sounds like the perfect time to eliminate Windows from your life and stick to Linux… EndeavourOS Linux, of course. 
I have one single program on windows: MJP.
Nothing to lose, erase windows and install endeavour.
What is MJP?
MJP = Mein Justiz Postfach. (=My Justice PO Box).
If you’ll allow me a piece of advice: stay on Windows 10. Windows 11 is basically bloatware full of spyware and abusive policies. Your computer is no longer yours, it’s Microsoft’s. They impose hardware requirements under the pretext of “security,” but in reality it’s a control mechanism that also makes it harder to install anything other than Windows.
They also push mountains of programs and updates you don’t want, collect your data, even take screenshots of your desktop, etc. Windows 10 isn’t perfect either, but it’s at least a bit better.
And the worst part is that by upgrading to 11 we’re basically surrendering to their abuses. Upgrading is like saying “I agree, go ahead.” I can’t do that. I’d rather stay on 10 for the two things I still use it for. Nothing bad will happen when support ends; it will keep working fine.
And fortunately we have Linux, which works beautifully — and you are the one who owns your PC.
unless this is something you need at all times could you not just put Windows 10 in a Virtual Box and just use it when needed?
however it looks according to going back to the Original I said you already did so.
ALWAYS install Microsoft Before Linux. Windows does not work well with Other Systems.
The upgrade to Win11 resized the ESP (UEFI) parition from 300MB to 299MB.
The computer is my Laptop.
Das MJP ist eine Webanwendung, welche Sie über einen beliebigen Browser nutzen können.
MJP is a web application that you can use via any browser.
I don’t like the way Microsoft pushed 11 out, because 10 was supposed to be “last” Windows and to be frank, it was okay. Not best, but okay. I was really disappointed when they announced 11 and even more when they released more information considering it.
If I did not install EOS to my wife’s old Acer, I would probably be still using Windows and had not found joy of using Linux again, mainly because I was in if not complete but at least half-dark about Proton for example.
But unfortunately things are so that to be able to work etc. Windows is something that most of us have to use even though we would not want to or that there would be better alternatives that organizations etc. won’t use.
So this is not win-win situation. But at least it’s win-lose in way, that at least nowadays there are alternatives to use for most of our other-than-work activity. 
