Microsoft software runs a large part of the work done on computers every day, from writing documents to managing servers. This category is the starting point for every Microsoft license we carry: Office and Microsoft 365, Windows operating systems, Windows Server, and productivity tools such as Project and Visio. Browse the subcategories to find the exact product, edition, and version you need, then complete a one-time purchase instead of a recurring plan where a perpetual license exists. Each key is delivered by email shortly after checkout, together with the download link and step-by-step activation, so you can install and start working the same day. If you are deciding between editions or versions, our support team can help you match the license to your setup. Instant Key is an independent reseller and is not affiliated with Microsoft; we supply license keys with digital delivery and activation instructions.