Windows 7, released in 2009, was a highly popular operating system that gained widespread acceptance among users worldwide. Despite its popularity, Microsoft continued to support the OS with regular updates and service packs. One of the most sought-after updates is Windows 7 Service Pack 3 (SP3). However, there has been much confusion and misinformation about the availability and installation of Windows 7 Service Pack 3, especially for 64-bit systems. In this paper, we aim to provide a comprehensive review of Windows 7 Service Pack 3, its features, and the process of downloading and installing it on a 64-bit system.