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Definition: Registry cleaner

A utility program that scans the Windows Registry and looks for outdated and invalid entries. Applications often create Registry entries for temporary data and pointers to other files, but never delete them. In addition, if folders are manually deleted by the user, Registry entries may point to files that do not exist. A Registry cleaner can be part of a package of system utilities or a stand-alone program.

Results of a Registry Scan
RegSupreme from Macecraft Software (www.macecraft.com) found 86 problems in this Registry scan. At this point, the user can "Select All" or click specific entries to be fixed. Before making any fixes, which usually means deleting the entry, the program makes a backup copy so that the prior state can be restored if required.