Hi tudorlady
Thank you for the screenshot, that does indicate your PC hardware is compatible with Windows 11.
However, your Windows 10 is installed in Legacy BIOS Mode, and Windows 11 will only install in UEFI mode.
It is a big job to convert to UEFI, there are two methods.
1
Backup your personal files, then clean install Windows 10 from a bootable USB and before doing that you will need to change BIOS to UEFI and convert the drive form MBR to GPT, which would wipe all data on the drive.
2
You can try to convert the drive without data loss from MBR to GPT using the tool that Microsoft provide, then boot into BIOS and switch to UEFI Mode
Before you attempt to do this, please backup your personal files.