Data backup to media or online, Recovery.
Replacement electronic parts, Upgrades, Recycling
Office 365, Online backups, Web hosting, email.
Always a 2nd backup of all important files (copy), on an external
drive/sticksor better on Tape / DVDs or online storage, and if possible
offsite.You are only as good as your last backup !!
Never open emails/links from unknown sources no matter how genuine they appear.
Get your laptop stripped down, and excess dust build up removed from air vents, radiator, heatsinks, main board.
Software check up, and updates applied.