In the sense that sometimes using a registry cleaner results in a
problem, and sometimes it doesn't, yes, it's really that way. The risk
of its causing a problem is always there.
No. There is always a risk of breaking something. Moreover there is
*no* advantage to cleaning the registry. Leave it alone.
Stable? There is no issue with registry stability.
I'll bet all these folks asking about registry cleaners don't really
understand what the registry is and how easy it is to screw it up.
Furthermore, they are probably confusing a cluttered and fragmented hard
drive (that is cluttered with temporary files) with a "cluttered"
registry. Most of us know that a registry "cluttered" with leftover
orphan entries has virtually no impact whatsoever on the performance of
a PC, but a newbie doesn't realize the distinction.
Further confusion no doubt comes from good (well, good in the event a
newbie refrains from using the registry cleaning function!) programs
like Ccleaner. Someone who uses Ccleaner (both the temp file cleaning
*and* the registry cleaning) and then notices an improvement in
performance can mistakenly conclude that is because they cleaned the
registry. Of course, the improvement is from the cleaning of the temp
files! Furthermore, the registry cleaning part of Ccleaner should be
avoided by newbies because they don't necessarily know what they're
doing!
I wouldn't recommend a registry cleaner to anyone unless they show an
active interest in understanding the nuts and bolts of the registry. And
here are the prerequisites:
1. Don't mess with it at all until Step 6.
2. Study the registry. There are books and Web pages that have good
information on it.
3. Learn to make backups of the registry JUST IN CASE.
4. Back up the registry!
5. Use regedit to the point of proficiency.
6. Don't use general all-purpose registry cleaners. Rather, use one like
Jouni Vuorio's RegCleaner (and oldie, but goodie), which automatically
backs up the entry changed for an easy undo.