You know all those registry cleaner in that link LOL as Microsoft and Ed bott have stated in the past, you do not need to use a registry cleaner on OS's like windows vista and especially windows 7 and I do believe it will be the same for windows 8 too.
And as for this registry cleaner being "Microsoft's" piece of work, it clearly isn't and I don't know how they got away with naming it that.
They do advise against using them, and to be honest I do think the standalone registry cleaners will eventually be pushed aside and forgotten about, I know of people that have just stopped using them since windows 7 or just using Ccleaner occasionally for cleaning up old registries, as I have said before windows 7 is designed to ignore old registries and therefore will not slow the system down.
Registry cleaners will very soon be a thing of the past
Harrish I would start thinking about focussing on something else other than reg cleaners... just a thought