Oracle Client software requires that you give the Authenticated User privileges to the Oracle Home folder.
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Log on to the server as a user with administrative privileges.
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Launch Windows Explorer from the Start menu and navigate to the ORACLE_HOME folder.
The default location is typically D:\App\Administrator\product\<Oracle version>.
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Right-click the ORACLE_HOME folder, and click Properties.
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In the Properties dialog box, click the Security tab.
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Click the Advanced button.
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In the Permissions list verify that the Authenticated Users are listed with Read & Execute in the Permission column and This folder, subfolders and files in the Apply to column.
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If the permissions are not set correctly, select the appropriate row in the table, and click Edit.
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Make sure the Apply onto list contains This folder, subfolders and files and that the appropriate permissions have been checked in the table. This should already be set properly, but it is important that you verify this.
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Click OK to close the Permission Entry for Checklists dialog box.
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Select the Replace permission entries on all child objects with entries shown here that apply to child objects check box.
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Click OK until you close all the security properties dialog boxes. An hourglass cursor may appear for a few seconds as the system applies the permissions you just changed to all subfolders and files.
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Restart the application.
Any application that is using Authenticated User privileges will not work. A notable
example is IIS, which might service some of the requests based on the Authenticated
User privileges.