An unexpected error occurred while updating required files wow
Users on client machines running Windows 10 Pro Version 1607 Build 14393.x (the August 2016 Anniversary Edition) on a network with Windows Server 2012 R2 providing file shares ran into a frequent problem when copying, creating or renaming folders on any share residing on the server.
Folder creation or folder renaming would take several minutes, would hang File Explorer, would often produce a popup error stating "Error 0x8007003B: An unexpected network error occurred" and - while this error was ongoing (several minutes) that file share would be unavailable to other processes running on the same client machine (which often led to other programs such as Auto CAD crashing.) This error began shortly after one of our client machines was updated to Version 1607.
It has not released in an update yet and will not be in the update releasing next week.
Note: Rebuilding the Index on the server did not help.
During startup, Windows Boot Manager may display the following error message: This problem can occur when a removable storage device is removed while it’s in use or it is failing.
Properly connecting any removable storage and restarting your PC may fix this problem.
The patch is for the Windows 10 Anniversary Edition workstations, no patch needed on the file server.
After applying the patch, and rebooting the workstations, you should turn search back on at the file server by setting the Windows Search service to Automatic in the Services MMC.