Hi @M B
The processor are selected by various parameters and the important one is DCH Design Principles.
https://learn.microsoft.com/en-us/windows-hardware/drivers/develop/dch-principles-best-practices
Some of the 7th generation processor and all 8th generation Intel processor are supported for Windows 11. It seems your Intel i3-6100 is not in the list and it might not support the Windows 11.
Windows 11 supported Intel processors
https://learn.microsoft.com/en-us/windows-hardware/design/minimum/supported/windows-11-supported-intel-processors
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