When you install SAS Service Pack 1 from the web site or from the SAS
Service Pack Installer CD to an existing installation of SAS 9.1.3, the
following error message might appear:

   Error: Change User ID
   The SAS Service Pack Installer could not locate a SAS 9.1.3
   installation.  This may be due to using a user ID that is different
   than the one used to perform the original installation. If this is
   the case, you should exit the SAS Service Pack Installer and restart
   using the original user ID.

   If you continue, the Service Pack installation and configuration may
   not complete successfully.  Would you like to stop applying the
   service pack at this time?

                             "Yes"    "No"

Select "No" to allow the installation to complete.

Then, during the installation of the service pack, a dialog box appears
with the following items:

   * Mid-Tier and Desktop Client Service Pack
   * SAS Foundation Service Pack
   * SAS Configuration Wizard

The installation checks for the first two products even if these
products are not installed. This is expected behavior.

The same behavior also occurs when you install SAS Service Pack 2 to
an existing installation of SAS 9.1.3. For the SAS 9.1.3 Foundation
installation, you only need the Service Pack 2 for SAS Foundation CD.
For the SAS 9.1.3 Foundation installation on a Windows 64-bit platform,
the Service Pack 2 for Foundation is part of the SAS Setup and is not
included in the kit. It is installed automatically.

See SAS Note  #014985  for troubleshooting steps.

Operating System and Release Information