When trying to install some application software in x32 or x64 editions of Windows system, you may encounter the following error message when trying to install the program by double clicking on Setup.exe installer. The programs affected include Adobe Photoshop CS3, Adobe Fireworks CS3, Adobe Flash CS3, Adobe DreamWeaver CS3, Adobe Creative Suite 3 Web/Production Premium, other Adobe Creative Suite 3 products, older Adobe CS2 software, and other software such as .NET and VB Reflector!, regardless of whether the software is trial or licensed product.

Setup has encountered an error and cannot continue. Contact Adobe Customer Support for assistance. Internal Error 2739.

The problem is applicable for both 32-bit or 64-bit version of Windows, normally Windows Vista or Windows 7. The solution for Internal Error 2739 problem is to re-register the JScript.dll (or optionally VBScript.dll) module in Windows, as suggested in Adobe Forums (link dead). To do so:

  1. Run an elevated command prompt as Administrator.
  2. For Windows 32-bit user, ensure that the command prompt is at C:\Windows\System32\ folder. For Windows 64-bit, issue the following command to change to 64-bit folder in order to use the correct DLL files:
    cd ..\SysWow64
  3. Type the following command and hit Enter:
    regsvr32 jscript.dll

    and optionally (if problem persists),

    regsvr32 vbscript.dll
  4. Run the Adobe installer and other setup program again.