Found on Microsoft'sTechNet Network Folders Slow after installation of Windows 10 1803 update

https://social.technet.microsoft.com/Forums/en-US/8e468316-c70f-4270-8778-c30215b7d3f3/network-folders-slow-after-windows-10-1803-update?forum=win10itpronetworking

"Greetings!

After installing 1803 upgrade for our Windows 10 Enterprise PC, we got some strange bug:

When user or application try to open file from shared folder with a thousands of files, it takes almost 1 minute.

We found same problem here:

https://partnersupport.microsoft.com/en-us/par_clientsol/forum/par_win/network-folders-slow-after-windows-10-1803-update/5c622107-46d5-43b3-a98c-9ae480968e77

Some manipulations with regestry help us, but it's weird:

Regedit

HKLM\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters

add 

DirectoryCacheLifetime Dword=0

FileInfoCacheLifetime Dword=0

FileNotFoundCacheLifetime Dword=0

Don't forget to reboot.



How about official fix?"