Win 7 does not check OS disks like older versions and there should be no reason whatsoever for it to be in the drive. If the PC is a good deal anyway I would buy your own copy of Win 7, Ultimate being a bit OTT for home use tho.
OnePlus 5T review: Hands-on
Illustrator Andrés Lozano on his improv line work, brazen use of colours & hand sketching
iPhone X review
Comment envoyer gratuitement des gros fichiers ?