For the full desktop "program," you can download and install Microsoft 365 directly from the official Microsoft Apps page. This requires a Microsoft account and a paid subscription.
Students and teachers with an eligible school email address may be able to get Office 365 A1 for free. Free Alternatives (Compatible with .docx) programma vord dokument skachat
If you need a desktop program but don't want a subscription, these highly-rated free office suites can open and save Word documents: For the full desktop "program," you can download
A popular free alternative for Windows that includes a document editor very similar to Word. For the full desktop "program