i cant upgrade to windows 11

Question

i have dell dell precision 5220

Windows 11 Intel® Core ™ i7-7820HQ

but ..

When I install Windows in final step , I get an error that the processor is not supported

Answer 1

Looks a little old.
Dell has not provided Windows 11 drivers for your device and does not support Windows 11 on that device.
https://www.dell.com/support/home/en-us/drivers/supportedos/precision-15-5520-laptop?ref=oscompatibility

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