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GN - Permissions for the PQ Systems registry key

Revision Date: 2006-08-14


Some PQ Systems products, such as CHARTrunner and SQCpack, store program settings and preferences in the registry. Preferences that apply to all users are stored in a child key of the following registry key:


On Windows 2000 and above the default permissions for non-privileged users on HKEY_LOCAL_MACHINESOFTWARE and below are to permit only Read access. During the installation of PQ software that use the registry, the permissions on the "PQ Systems" key are relaxed to allow non-privileged users to be able to store program settings.

A problem may occur during installation that prevents the appropriate permissions from being applied to the "PQ Systems" key. In that case, an error message related to a problem writing to the registry may occur while running the PQ software product as a non-privileged user. An example of one such message follows:

Access to Registry Denied


The solution is to give all authenticated users both Read and Write access to the "PQ Systems" key and all of its child keys and values.

You must be logged into Windows using an account that has local administrator privileges while performing the following steps.

Click on Start > Run and open regedit.exe. Navigate to the HKEY_LOCAL_MACHINESOFTWAREPQ Systems key as shown below.

Right-click on the "PQ Systems" key and select Permissions... as shown above. The "Permissions for PQ Systems" window should open as shown below.

If the "Authenticated Users" group in not present in the list, as shown above, then click the Add button and add this group.

Select the "Authenticated Users" group as shown above, and then click the Advanced button. The "Advanced Security Settings for PQ Systems" window shown below will open.

Select the "Authenticated Users" group as shown above.

Ensure that both of the checkboxes are selected, as shown above.

Then click the Edit... button. The "Permission Entry for PQ Systems" window shown below will open.

Set the permissions as shown above, and then click OK on each open window until you are back to Registry Editor. Close Registry Editor.

Verify that the PQ software product now runs properly.

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