Thanks to everyone who helped. I was able to resolve the situation with
the following code:

UPDATE Table001 SET
Table001.[Active] = 'Inactive'
WHERE (((Date()+Time()-Table001.[Date\Time])>('::13::')) AND
((Table001.[Del14])= 'Yes'));

This is a common misconception - and one that I used to share - but it is a
misconception. Many built-in VBA functions, including Date() and Time, can
be used in JET queries when executed outside of Microsoft Access. For
example, here's a C# console app that executes a query against a JET
database using Date() and Time(). The output from this program on my system
(dd/mm/yyyy format) is ...

23/03/2006 00:00:00
30/12/1899 14:56:17

namespace TestJet
{
class Class1
{
 [System.STAThread]
 static void Main(string[] args)
 {
  System.Data.OleDb.OleDbConnection connection
   = new System.Data.OleDb.OleDbConnection();
  connection.ConnectionString
   = "Provider=Microsoft.Jet.OLEDB.4.0;"
   + "Data Source=C:\\usenet\\asp_test_data.mdb;"
   + "Persist Security Info=False";
  System.Data.OleDb.OleDbCommand command
   = new System.Data.OleDb.OleDbCommand();
  command.CommandText =
   "SELECT Date() AS TheDate, Time() AS TheTime FROM Employees";
  command.CommandType = System.Data.CommandType.Text;
  command.Connection = connection;
  System.Data.OleDb.OleDbDataReader reader = null;
  try
  {
   connection.Open();
   reader = command.ExecuteReader();
   reader.Read();
   System.Console.WriteLine(reader.GetValue(0).ToString());
   System.Console.WriteLine(reader.GetValue(1).ToString());
  }
  finally
  {
   if (reader != null)
   {
    reader.Close();
   }
   if (connection != null && connection.State
    != System.Data.ConnectionState.Closed)
   {
    connection.Close();
   }
  }
  System.Console.ReadLine();
 }
}
}