Removing Apps
This page explains how to select and remove apps, choose the removal scope, and handle files that are still in use.
Starting a removal
There are three ways to begin:
- Select one or more apps and click Uninstall in the action bar above the list.
- Right-click a single app and choose Uninstall.
- Use Actions → Uninstall.
A selection survives a change of Smart View. Before you confirm, glance at the number in the action bar — if it is higher than you expect, use Reset selection and start again.
The removal dialog
Before anything is touched, O&O AppBuster shows you what it is about to do.
The list of apps
The dialog names the app (or the number of apps) you selected. Long selections are shown as a short list with a Review all › link that expands the complete set, so you can check every entry before confirming.
The removal scope
For Windows apps you choose how far the removal should reach:
| Scope | Effect | Notes |
|---|---|---|
| Current user | Removes the app from your account only. Other accounts keep it. | The least invasive option. |
| All users | Removes the app from every account on this PC. | Requires administrator rights. |
| Entire PC — including files | Removes the app everywhere and deletes its leftover files from disk. | Marked Most thorough. Choose this when you want the space back. |
The scope applies to Windows (Store) apps. Desktop apps are always removed by their own uninstaller, because that is the only correct way to remove them. Desktop apps have no concept of per-user removal, so you may see the uninstaller's own window and have to confirm its dialogs. The dialog tells you when your selection contains desktop apps.
Confirming
Remove apps starts the removal. Cancel aborts it and leaves the system unchanged.
The dialog also reminds you that a removal cannot be undone from within O&O AppBuster. Windows apps can be reinstalled afterwards, and a system restore point can take the whole system back — but there is no per-app undo button.
While the removal runs
A progress dialog shows:
- the action being performed and the chosen scope,
- how many apps have been processed (3 of 12),
- which app is currently being worked on.
You can cancel at any time. Cancelling stops before the next app; apps already removed stay removed.
Desktop apps are processed one after another, because each one runs its own uninstaller. If several of those uninstallers ask questions, you will be answering them in sequence.
The result
When the run finishes, the dialog turns into a report:
- App removed / All N apps removed when everything worked,
- N removed · M skipped when some apps could not be processed.
Removed apps are listed, and skipped apps are listed separately together with the reason — most often A file is in use by another process.
Two buttons help you finish the job:
| Button | Effect |
|---|---|
| Retry skipped | Attempts the skipped apps again — useful after you have closed the program that was holding a file. |
| Save log… | Writes a removal report to a text file, including scope, removed apps, skipped apps and reasons. |
When files are in use
If an app's files are locked by a running program, O&O AppBuster tells you which programs are holding them and offers three ways forward:
| Option | What happens |
|---|---|
| Close these programs and remove | The blocking programs are ended and the removal continues. |
| Remove on next restart | Windows deletes the files during the next boot. The app is listed under Will be removed after restart. |
| Skip this app | Nothing is done to this app; the run continues with the next one. |
If anything was deferred to the next boot, the result dialog reminds you to restart your PC to finish removing those apps.
"Close these programs and remove" ends the blocking programs without asking them to save. If one of them is an editor with unsaved changes, save first.
What exactly gets removed
Windows apps (Store / UWP)
The app package is deregistered for the chosen scope. With Entire PC — including files, the app's data folder is deleted as well, which is where most of the reclaimable space usually sits.
Desktop apps (Win32 / MSI)
The app's own uninstaller is run — msiexec for MSI-based installations, or the uninstall program the app registered. O&O AppBuster then clears the uninstall registration if the uninstaller left it behind.
Orphaned apps
There is no app left to uninstall, so the leftover itself is removed: the data folder, the ghost installer registration, or the stale uninstall entry. See Orphaned apps.
Defect apps
Windows cannot uninstall these because the cached installer package is gone. O&O AppBuster removes the Windows Installer product registration, the uninstall registry entries, and the app's remaining files directly. See Defect apps.
What cannot be removed
System apps and framework apps are shown for information only. Windows and other apps depend on them, so O&O AppBuster does not offer to remove them; their status reads Unremovable.
Individual apps may also refuse removal because Windows itself protects them. In that case they appear among the skipped apps with the reason Couldn't be removed.
Before a larger clean-up
- Create a system restore point. It is the one step that makes everything else reversible.
- Start with the recommendations. They are the apps with the lowest risk.
- Work in batches. Removing twenty apps at once and finding a problem afterwards is harder to untangle than removing five at a time.
- Save the log if you are cleaning up someone else's PC. It is a record of exactly what you did.