You will need to check if your PC is compatible with Windows 11 and in this case you will need to run PC Health Check app.
Have a look at:
It will let you know if you are able to upgrade to Windows 11 or not.
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I have Windows 10 Pro (Raid 1 - hardware array with 2 SSD). Can I install Windows 11 without any issues and what happens to the array?
You will need to check if your PC is compatible with Windows 11 and in this case you will need to run PC Health Check app.
Have a look at:
It will let you know if you are able to upgrade to Windows 11 or not.
Kindly check:
Windows 11 System Requirements
Download the PC Health Check app
Accept the terms, and click Install to proceed with the installation
When the process is done, click the Finish button.
Now click on the Check Now button.
You can click on See all results to check the situation.