Missing files cannot be copied between computers because they are unique. These files are required for uninstalling and updating applications. MSP files) will be stored in the Windows Installer Cache. SQL server installation packages (.MSI and. If the installer cache has been compromised by deleting files, you may not immediately encounter problems until you uninstall, repair, or update SQL Server.īecause SQL Server uses the Windows Installer technology, it can be affected by the issues that are described here. The Windows Installer Cache, located in c:\windows\installer folder, stores critical files for applications installed through the Windows Installer technology. When you install a Microsoft SQL Server service pack or a cumulative update, you may encounter various error messages that indicate Windows Installer Cache problems.
Customers who use this emergency process should validate their Windows Installer Cache using the Windows Installer Cache Verifier Package, as directed in KB article Missing Windows Installer cache requires a computer rebuild. The process that's described in this article provides emergency relief only and not a permanent fix.
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