Slower SMB read performance for large files in 22H2
Published Oct 03 2022 10:35 AM 59.6K Views

Heya folks, Ned here again. There is a performance reduction in 22H2 when copying larger files from a remote computer down to a Windows 11 computer or when copying from any Windows computer to a remote Windows 11 computer. 


Fix update 03/06/2023: update February 28, 2023—KB5022913 (OS Build 22621.1344) Preview - Microsoft Support contains the kernel update that fixes this issue. 


For the latest information about this issue, please see the known issues section of KB5017389

If you are using Microsoft 365 admin center and have Windows Release Health available there, you can view this issue in the Windows 11, version 22H2 section. The ID on Microsoft 365 is WI442499.

Version history
Last update:
‎Mar 06 2023 09:51 AM
Updated by: