Problem in short:
Windows 10 PRO experience slow network search on a share filled with PDF files. The share is located on a Windows Server 2012 R2.
Last year the server has been replaced for a Windows Server 2012 R2, during this period all clients were upgraded towards Windows 10 PRO.
We have a couple Thin Clients that work on a Terminal Server.
On the Windows Server 2012 R2 we have a couple shares configured, 1 of those shares is having only PDF files.
1 Windows 10 client is having issues searching on a share that is filled with scanned documents saved as PDF files.
Other clients in the network dont seem to have this issue, also the Terminal Server is not having this issue with the same user that is having the issue on the Windows 10.
It contains 1 Machine that has this problem, Windows is up-to-date with its updates.
The problems started since last week (About 5-7 days ago).