Grzegorz

You are wrong, I'm afraid. Page Defrag from Sysinternals does not remove empty space inside the registry. If the registry is in pieces, it only joins into one continous area.

I look at the screenshot above and notice that CCleanear reports in left upper corner: - on my XP Home with SP2 only MS Windows XP, - shows 511 MB RAM except 512 MB RAM.