Issue
When youinstall Adobe Creative Suite 3 or a stand-alone Creative Suite 3application in Windows Vista, one or more of the following occur:

Afteryou launch the Setup.exe file, the application returns the errormessage, "This software cannot be installed because J is not properlyregistered. Please repair J and then restart the installer"
The installer quits without an error message, though Setup.exe appears in the Task Manager.
You receive the error message, "Setup has encountered an error and needs to close. Error Code: 2739."
Installer log displays the error message, "Error 2739: Could not access Java runtime for custom action"

Solution
Disclaimer:This procedure involves editing the Windows registry. Adobe doesn'tsupport editing the registry, which contains critical system andapplication information. For information on the Windows RegistryEditor, see the documentation for Windows or contact MicrosoftTechnical Support.

Manually register the j.dll file.

On Windows Vista32:

Choose Start > All Programs > Accessories.
Right-click the Command icon, choose Run As Administrator, and authenticate.
Navigate to Windows\System32.
At the prompt, type regsvr32 j.dll and press Enter.
When a dialog box with the message "DllRegisterServer in j.dll succeeded" appears, click OK.

On Windows Vista64:

Choose Start > All Programs > Accessories.
Right-click the Command icon, choose Run As Administrator, and authenticate.
Navigate to Windows\SysWow64.
At the prompt, type regsvr32 j.dll and press Enter.
When a dialog box with the message "DllRegisterServer in j.dll succeeded" appears, click OK.

打开CMD窗口，一定要使用管理员方式打开。
然后进入Windows\System32目录。
假设你的Vista装在D:，那么在Cmd窗口中输入：
d:
cd Windows\System32
最后：
输入  regsvr32 j.dll  回车
就成功了