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Error Updating AppInit DLLs in the registry when installing EP5 print client

Article # 3015695 - Page views: 368


A message box reading "Error Updating AppInit_DLLs in the registry" pops up when installing the EP5 print client and the installation fails.


This can be caused by a rights issue within the workstation's registry

Along with creating the Equitrac group, the Equitrac print client installation also writes to this registry key: 

32 bit: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows\Appinit_DLLs64 bit: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Windows\Appinit_DLLs

In this key are supposed to be the paths for EQDtpSpy.dll  and EQPortMonitorSpy.dll.  These are the DLLs that are launched with every application to track printing.

Have the client open the registry and browse to the key above and verify that the user has full rights to this key.  In one instance we found that the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows key was inaccessable causing this error.  After the firm's administrator corrected the rights on that key in the registry, the print client installed correctly and worked fine.