You don't have to format, helfit, but it is advisable. If you have the upgrade XP CD you will be asked for your Win 98 CD during the installation to prove you're entitled to the clean install.
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 ?