Undo means undo

When several repairs run together, undo now covers every one of them, not just the first, and it can remove settings a repair added rather than only restoring what was already there.

• Combined repairs are now fully reversible. When the app runs several fixes together in one pass it takes a single safety backup first. That backup used to cover only the first repair in the list, so undoing a combined run could leave the other repairs in place with nothing to restore them from. The backup now covers every repair in the run: all of their settings, the strongest protection level any of them needs, and a Windows System Restore Point whenever any repair in the group calls for one. Which repair happened to be listed first no longer decides how well you are protected
• Undo can now remove settings a repair added. Some repairs work by adding a setting that was never there before. Putting a backup back can restore old settings, but it cannot remove a setting that did not exist to begin with, so those changes used to survive an undo. Undo now restores what was there and removes exactly what the repair added, and nothing else. Eighteen repairs were converted to this exact method, covering privacy, performance, search, drivers, and the Windows AI switches. A setting your workplace or another program put in the same place is never touched
• Repairs that change a Windows service can be undone. Five repairs switch a background service to a different startup mode, covering Delivery Optimization, Windows Search, the Windows time service, and the Recall platform service. Three of them previously saved nothing that could put the service back. All five now record the previous setting before changing it, and a new check makes it impossible for a future repair to change a service without recording how to reverse it
• Honest labels. The reversibility label on a combined repair reflects the least reversible repair in the group, so a run is never described as more recoverable than it is. Four repairs still change something that cannot be reversed automatically, and the app now says exactly that instead of promising a full undo
• Safer on a different computer. Undoing a portable-drive snapshot on a machine other than the one it came from now judges the risk by the most sensitive repair in the group rather than the first, and explains why it is declining
• Anonymous statistics hygiene. Our own testing could previously reach the anonymous statistics that tell us which repairs work in the field, making test activity look like real usage. Test and development runs are now marked at the source and excluded. Nothing about what is collected from real installs changed, and the privacy setting works exactly as before