Yep...
I Know that almost all of those softwares that does Registry Cleaning on Windows can not be considered safe...
Most of then brings Bundleware, with crap softwares...
But a thing that can't be denied is that, ifo you are a normal guy that installs an uninstall several softwares on your machine, tools like CCleaner do their job removing unneeded entries on registry... and improving the performance.
I love almos all the tools from sysinternals!
Cold anyone at Sysinternals create a tool that do cross referenced lookup in all of the registry removing crap?