0x80004005 unspecified error on Windows 11 when copying files

that error is annoyingly vague, so the first job is finding which file it chokes on. copy the folder in smaller chunks and see where it stops. once you know the file, the usual causes are: it's open in another program, it's inside a zip (extract it with 7-Zip first instead of dragging out of the zip in Explorer), or the full path is very long. moving the folder closer to the root, like C:\temp, fixes the path one. if it only happens copying to one drive, try pausing your antivirus for a minute and retry.