Windows 11 — 24h2 Update Size

Before the update begins, ISD scans the user’s current Windows installation. It generates a "local hash map" of system files. Instead of downloading the entire new version of a file (e.g., ntoskrnl.exe ), the system requests only the binary "diffs" (the changes between the old and new versions).

Microsoft and community experts recommend having at least 40 GB to 64 GB of free space on your C: drive. This is not because the update itself is that large, but because Windows creates a Windows.old backup folder to allow for a rollback if something goes wrong. windows 11 24h2 update size

If you are updating via Windows Update, expect a download between 3.5 GB and 5.5 GB . For those using an ISO file for a clean install or manual upgrade, the file size is approximately 5.41 GB . Before the update begins, ISD scans the user’s

: Most users can expect a download between 5.4 GB and 5.8 GB . Microsoft has worked to reduce this by roughly 200 MB compared to previous versions like 23H2 by optimizing how built-in apps are handled. Microsoft and community experts recommend having at least