There are various ways in which we can classify. Major: A defect, which will cause an observable product failure or departure from requirements. Minor: A defect that will not cause a failure in execution of the product. Fatal: A defect that will cause the system to crash or close abruptly or effect other applications.
Auslogics Registry Cleaner is registry cleaner/fixer utility whose purported purpose is to remove redundant items from the Windows registry. The software helps to automate the process of looking for invalid entries, missing file references or broken links within the registry and resolving or removing them.
Of all the free registry cleaners, Wise Registry Cleaner Free should be considered the Mac Daddy of them all. One nifty feature: If you double-click a registry entry (after scanning), Wise Registry Cleaner will open that entry up in the Registry Editor, where you can manually edit or delete it.