KNOWN ISSUE: If Outlook Express installation files are deleted from a machine, PMS still classes the machine as having Outlook Express installed.

Article:TECH144094  |  Created: 2010-11-12  |  Updated: 2010-11-17  |  Article URL
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Article Type
Technical Solution




When Windows XP is installed, Outlook Express is installed by default, and its installation files are found in the ".\Outlook Express" directory.

If you uninstall Outlook Express via "Add/Remove Programs", all that happens is its menu items are removed.  This is because Microsoft has classed Outlook Express as a core Windows component, and should not be removed from the file system.

Because of this, PMS will still detect that Outlook Express is on the system, and will deploy and successfully deploy Outlook Express updates to the machine, as the update rules look for registry and file items.

Now, if the contents of the installation folder were deleted by the desktop build team, PMS will still class Outlook Express as being installed as its IsInstalled rule only looks for registry items, but Outlook Express updates will fail to install as their rules will not find the file items.


Outlook Express updates are continuously installed and scheduled on systems that have had their Outlook Express folder contents deleted.


Windows XP


Outlook Express IsInstalled rule only looks for registry items, causing PMS to think that Outlook Express still exists on the system.


The Outlook Express IsInstalled rule needs modifying so that it also checks for file items.

Supplemental Materials


Outlook Express 6.0 – English IsInstalled rule returns true if Outlook is uninstalled.

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