Microsoft warns users: copying and saving files in Windows 10 and Windows 11 causes intermittent issues

Microsoft has recently acknowledged an issue that affects some 32-bit applications when it comes to saving and copying files on different versions of the Windows operating system. The problem occurs mainly during file transfers to network shares, particularly in Windows 11 21H2 and 22H2 (after installing KB5023774 or later updates) or Windows 10 21H2 and 22H2 (after installing KB5023773 or newer updates).

The intermittent nature of this issue means that only applications that are sensitive to large addresses and use the CopyFile API are affected. Microsoft clarified that Windows devices are more susceptible to this problem when using certain commercial or enterprise security software that uses extended file attributes.

The issue does not affect the file copying functionality of the File Explorer itself. Instead, it affects the CopyFile API, which is used by specific applications. Microsoft has identified Microsoft Office applications such as Word and Excel as potentially susceptible to this issue, but only when using 32-bit versions. Users may encounter "Document not saved" error messages.

It should be mentioned that consumers using Windows devices in personal or unmanaged commercial environments are unlikely to encounter this known issue. The problem mainly affects devices managed by the company that use specific software and configurations.

Although Microsoft has fixed the copy and file save issues in Windows 10 and Windows 11 21H2, the latest version of Windows 11, version 22H2, is still awaiting a solution. However, Microsoft advises affected customers to employ a workaround when attempting to save or recopy files until an official solution is available. The availability of a workaround for other affected versions provides some relief to users and administrators experiencing these file transfer and save errors.

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