I noticed in the release notes for the latest version of CCleaner:
<quote>
v3.00.1303 (28 Oct 2010)
- New CCleaner 64-bit native EXE.
</quote>
However, when I downloaded and installed it (from Piriform), and ran it, it still ran as a 32-bit app (under WOW64). I want to download the x64 version. Where can I find and download this version?