PCs need Windows 10 or 11, 1GB of RAM, and 4GB of hard disk space. You can get Microsoft Office Pro 2021 for Windows on sale for $39.97 right now (reg. $219.99), though prices can change at any time.
Pay just once and get a lifetime license to the Microsoft Office 2021 app suite (including Word, Excel, and PowerPoint) on your PC for 84% off right now (there's a deal for a Mac version, too).