"Comodo Time Machine is a free program that can roll your system back in time, on-demand, to a previous state. It provides the ability to “undo” any kind of undesirable event, such as a virus or malware infestation or any event or events that might have caused your PC to become too cluttered, slow, or unresponsive, by giving you the ability to revert back to a baseline state or to a snapshot of the system taken before the problem started. It also provides the ability to recover any data or files that may have been accidentally deleted, saved-over, or damaged in any way."