The problem occurs when accessing the file C:\PDOXUSRS.NET, which is used by the Borland Database Engine (BDE). It is caused by improved security in Windows Vista and Windows 7. Access to files in the root directory of the system drive (typically, C:\) is secured more than in earlier versions of Windows. It is recommended that you create a new directory, e.g., C:\BDE, and specify this directory as the value of the Paradox driver's NET DIR parameter via the BDE Administrator (bdeadmin.exe) (see the screenshot below).
You must run the BDE Administrator as an administrator.
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