Win11 22H2 Moment 2 update will completely resolve slow file copying issues

Microsoft is expected to launch the Win11 22H2 Moment 2 update in March this year, which will fix the slow file copying problem. Microsoft initially believed that the problem was in the Server Message Block (SMB) protocol, but Microsoft subsequently confirmed that the problem existed in the kernel itself.

In the Win11 Build 25252 version update released on November 28, Microsoft stated:

Fixed the network-to-local copy ( For example, copying files from a network share is slower than some users expect.

In the update on December 14, Microsoft continued to write:

The Win11 Build 25267 preview also provides an upgraded fix patch. This release fixes an issue where restartable copies of files with alternate data streams (e.g. using Robocopy) would often freeze. Once the upgraded fix is ​​verified on the Windows Insider channel, it will be merged into monthly cumulative updates through Windows Update.

Microsoft mentions it again in the Win11 Build 22621.1343 (KB5022913) change log, which we translate as follows:

We fixed an issue affecting copying from the network to a local drive. Replication is slower than expected for some users.

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