If the string value is present in the "Patches" Multi-sz value, delete the string value.
If the string value is present, delete it. HKEY_LOCAL_MACHINE\Software\Classes\Installer\Products\\Patches If the product was installed per-machine, follow these steps: If this subkey is missing, skip this step. Open the following subkey, and then remove from the "AllPatches" multi-sz value: Make sure that the LocalPackage string value is set to the path of the software update.ĭelete remaining software update references. To do this, verify the checksum of the software update.Ĭreate a LocalPackage string value in the registry subkey that you created step 2. You can reduce the security risk by making sure that the software update is the correct software update. However, this is the only way to repair the corruption. It's a security risk to re-create the software update cache registry. Verify that the software update has the correct Patch Globally Unique Identifier (GUID) in the Summary Information Stream and targets the correct product GUIDs. Search the %windir%\installer\*.msp for the software update that you tried to install. Re-create software update cache registry details. If the referenced package exists and no additional action is required. If the LocalPackage string value or referenced package is missing, the product is affected. If the subkey exists, verify that the LocalPackage string value is set correctly, and that the package referenced by the LocalPackage string value also exists. If the subkey is missing, the product is affected. HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Installer\UserData\\Patches\ HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Installer\UserData\\Products\\Patches\ Under this subkey, there will be a subkey for every software update that was applied to the product.įor each subkey that is in the following format, perform the following step: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Installer\UserData\\Products\\Patches Then, you can restore the registry if a problem occurs.įind the software update registration of the product by opening the following registry subkey: For added protection, back up the registry before you modify it. Therefore, make sure that you follow these steps carefully. 
However, serious problems might occur if you modify the registry incorrectly. This section, method, or task contains steps that tell you how to modify the registry.
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