Looks like users who upgraded their PCs to Windows 11 22H2 came across another bug. The latest to add to the wagon suppresses the ability to download files by as much as 40 percent. This was confirmed by a Microsoft program manager. However, rest assured as we have a workaround until the tech giant gets it resolved.
Windows 11 Bug Causes Slow Download Speed
According to Ned Pyle who is a principal program manager at Microsoft, the Windows 11 22H2 update has a performance regression bug in its ability to copy or download files from a remote computer to a PC running on Windows 11 22H2 and using Server Message Block (SMB) protocol to transfer the files.
As the report published on Petri.com adds, the bug is causing both the copying and downloading files to be suppressed by as much as 40 percent of their original speed. It appears to be affecting PCs that underwent Windows 11 22H2 update since those which didn’t, had no issue downloading files over SMB.
If that’s not all, the bug is likely hindering copying locally stored files as well (say, from one folder to another). Perhaps, you must know that the bug is slowing down transfers of files that are multi-gigabyte in nature where the slow speed is much apparent.
Pyle mentioned that they are currently working on finding what’s causing the issue since it isn’t related to the SMB code. Additionally, there’s no ETA available at the moment but there’s a workaround.
According to Pyle, entering the below snippet in the Command Prompt should allow overcoming the performance regression bug until the issue is resolved permanently.
robocopy \\someserver\someshare c:\somefolder somefile.ned /J
Where you need to replace the examples to the actual path and file name in order for it to work. Let us know whether it works or not.