The normal CCleaner program, but it doesn't require installing.

CCleaner removes unused and temporary files from your system - allowing it to run faster, more efficiently and giving you more hard disk space. CCleaner also comes with a registry scanner that scans for invalid references (advanced users) .

Download notes:
* Alternatively you can download the latest standard version of this software.

Cleans the following:

• Internet Explorer Cache, History, Cookies, Index.dat.
• Recycle Bin, Temporary files and Log files.
• Recently opened URLs and files.
• Third-party application temp files and recent file lists (MRUs).
• Including: Firefox, Opera, Media Player, eMule, Google Toolbar, Netscape, Office XP, Nero, Adobe Acrobat, WinRAR, WinAce, WinZip and more...
• Advanced Registry scanner and cleaner to remove unused and old entries.
• Including File Extensions, ActiveX Controls, ClassIDs, ProgIDs, Uninstallers, Shared DLLs, Fonts, Help Files, Application Paths, Icons, Invalid Shortcuts and more... Backup for registry clean.
• Windows Startup tool.

What's New:

We're please to announce the release of version 3.17 of CCleaner. This new build adds many improvements, including better support for the latest Google Chrome beta versions, and wildcard support in the Cookies list for simpler entry.

Release notes:

• Added support for Firefox 12 final release.
• Added support for Google Chrome 20.0 beta.
• Added multi-select to detailed results view.
• Improved support for Internet Explorer 64-bit Add-ons.
• Improved folder detection algorithm for cleaning items.
• Improved scrolling interface for Include/Excluding dialogs.
• Improved compatibility with Windows 7 alt-tab functionality.
• Improved user interface for Drive Wiper Tool.
• Added support for Opera Portable.
• Added cleaning for Corel VideoStudio Pro X5, MS Security Client and GIMP 2.8.
• Improved cleaning for OpenOffice 3, AIMP 3.
• Minor GUI improvements.
• Minor bug fixes.