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.
Every once in a while, I run across a program that seems too good to be free--but truly is. Wise Registry Cleaner 7 is such a program. Actually, it's a bit more than a registry cleaner. It also defrags the registry and offers quite a few system tweaks under its System Tuneup tab. As a registry cleaner, Wise Registry Cleaner 7 has performed well for me. It always seems to find more stuff than CCleaner, another effective freebie that also removes other types of file detritus.