![]() Scripts in this folder will only run in one upgrade and won't be migrated for future upgrades.Ĭreate a unique GUID to clearly identify each script you run. Windows Setup will migrate scripts in these folders so they are run in future upgrades. Windows Setup automatically looks for these scripts in the following locations, and will run them if they are present: Folder Custom actions folder structureĬustom action scripts run from subfolders in %windir%\System32\update\, depending on whether you want scripts to run for a single upgrade or on all future upgrades. Custom actions are not supported for feature updates that are installed via enablement packages. For example, updating from Windows 10, version 2004 to Windows 10, version 20H2. Some Windows feature updates are installed via a monthly quality update, and later turned on through an “enablement package,” a small, quick-to-install “master switch” that activates the Windows features. success.cmd is new for Windows 10, version 2004.Ĭustom actions run during a feature update that is installed by Windows Setup. If the feature update succeeds, success.cmd can be used to perform post feature update actions. If the feature update fails or has to be rolled back, failure.cmd can be used to perform custom operations or undo actions of previous custom scripts. Completion: This phase is after Setup completes.postuninstall.cmd is new for Windows 10, version 2004. ![]() Actions during this phase are specified in postuninstall.cmd.
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