Microsoft KB Archive/283770

= Visio2000: DCOM95 Cannot Be Installed Error When You Install Visio Network Equipment =

Article ID: 283770

Article Last Modified on 2/9/2006

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APPLIES TO


 * Microsoft Visio 2000 Enterprise Edition, when used with:
 * Microsoft Windows 2000 Standard Edition

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This article was previously published under Q283770



IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry



SYMPTOMS
When you try to install Visio Network Equipment (VNE) after you successfully install Visio 2000, you may receive the following error messages:

Setup has detected older versions of system files that are required for this solution. To continue with Setup and have Setup update the system files, select Yes....

DCOM95 can only be installed on Windows 95. For Windows NT and Windows 98, please install latest service packs.



CAUSE
This problem occurs when you are running Microsoft Windows 2000, and Distributed COM (DCOM) is not enabled on your computer, or the following registry key is incorrectly set to something other than Y:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole\EnableDCOM



RESOLUTION
To resolve this problem, use either of the following methods.

Method 1: Run the DCOM Configuration Utility
DCOM contains a configuration utility that modifies the Windows registry. To run this utility, follow these steps:
 * 1) Click Start, and then click Run.
 * 2) In the Open box, type DCOMCNFG, and then click OK.

The Distributed COM Configuration Properties utility starts. Click No in any DCOM Configuration Warnings that appear.
 * 1) In the Distributed COM Configuration Properties dialog box, click the Default Properties tab.
 * 2) Click to select the Enable Distributed COM on this computer check box, and then click OK.

Now that DCOM is enabled on the computer, you can run Setup from the VNE CD to set up Visio Network Equipment.

Method 2: Edit the Windows Registry
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

 Quit all Windows programs. On the Start menu, click Run. In the Open box, type regedit, and then click OK. In the left pane of Registry Editor, select the following registry key (folder):

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole

 On the Edit menu, point to New, and then click String Value. Type EnableDCOM and press ENTER.</li> On the Edit menu, click Modify.</li> In the Value data box, type Y, and then click OK.</li> On the Registry menu, click Exit.

The Registry Editor automatically saves your changes.</li></ol>

Now that DCOM is enabled on the computer, you can run Setup from the VNE CD to set up Visio Network Equipment.

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STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

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MORE INFORMATION
For additional information about how to run the DCOM Configuration utility to change the Windows registry, click the article number below to view the article in the Microsoft Knowledge Base:

176799 INFO: Using DCOM Config (DCOMCNFG.EXE) on Windows NT

Additional query words: prb COM

Keywords: kbprb KB283770

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