McAfee updates its version numbers frequently. If you have an offline installer from three months ago, it will still work; it will simply update its virus definitions once connected. Without it, you are dependent on McAfee hosting the specific version you need forever.
To understand the value of an offline installer, you must first understand how modern software deployment typically works. mcafee offline installer
A: Yes. Windows 11 shares the same core architecture as Windows 10 (NT kernel). Ensure you download the Windows 10/11 64-bit version. McAfee updates its version numbers frequently