Microsoft released a significant upgrade to Windows 11, called Moment 2. This week, another minor update was released, which caused some problems for some users. They suddenly slowed down the speed of solid state drives. As a temporary solution, Microsoft suggested that they copy the files via the command line.
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The update package for Windows 11 22H2 is marked as KB5023706. It's possible that the speed decrease results when copying large files that are several gigabytes in size. Most often, the issue arises when copying data from network shares using the SMB protocol, although there are precedents with poor performance in the local environment.
According to Microsoft, the issue due to its network nature should go unnoticed for most users at home or in a small office: one of the users of the Reddit forum claims that the data reading speed had dropped from 7 to 1 GB / s when the update was removed, so there is no doubt about the reasons for the failure.
Microsoft has a temporary workaround: to copy network files via the command line interface without I / O buffering, using the robocopy or xcopy utilities. The solution, obviously, isn't ideal; Microsoft is already working on remediating the issue.
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