PDF Association Kept Changing on a Terminal Server

.pdf association on the terminal server kept getting changed to DWGViewer by default
I believe this is a user error however I did the following to lower the confusion to the end user when opening a PDF in intuitive

Backup and Delete the Key here for each user having the problem:

“HKCU\Software\Microsoft\Windows\Currentversion\Explorer\FileExts\.pdf”

Check if associations are now correct if not copy this script to a BAT file and run it:

assoc .pdf=AcroExch.Document
assoc .pdf=AcroRead.Document
assoc .pdf=AcroExch.Document.DC
ftype AcroExch.Document=”C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe” “%1″
ftype AcroRead.Document=”C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe” “%1″
ftype AcroExch.Document.DC=”C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe” “%1”