The features list says it works with all flavors of Windows since 2000, but it does not say anything about server versions. I believe Windows Home Server (WHS) is based on Windows Server 2003. Any and all info would help. I'd like to have some data before I give it a try. Thanks.

i would like to know same thing if it works with Windows Home Server

Works with the Server Editions listed here:

http://docs.piriform.com/ccleaner/introduc...em-requirements

Hope that helps.

That list is for CCleaner, not Defraggler. I cannot find the same list for Defraggler.

Not hard to find this info out at all, it's listed here:
http://docs.piriform.com/defraggler/introd...em-requirements