That CPU is unsupported by WIndows 11 -- you need an 8th generation minimum.  
today i clicked on check for updates and saw a message about the above with a whole long list of possible reasons and i cant see what the actual problem is , does anyone have the same laptop and solved the above ? my ram and disk space are ok.  i5-7200u, 8GB RAM, 256GB SSD . there was something about TMP or TPM and my version is 2.0 which is ok for W11
cant upgrade to W11 , dell 5280 ( 5288 ? same thing ? )