Question ideapad 3-15ITL05

[GySgt_Rcn_43c_kls]

I have 2 these given to me today,, not familiar with these, I want to wipe them and install windows 7 since thats what I use.. any help would be great...Gunny

 

[GySgt_Rcn_43c_kls]

Bios recovery boot is still leaving files,,, one laptop still has "grandma's boy" files, 6/5/21 original installer with Microsoft,, while installing hardware he surfed the internet and left family photos..I want to remove All of his Windows install and Left over mud.