You should clear out your Windows at least once a year. A good tool for this endeavor is the free CCleaner.
In the current version 3.20 a lot has changed again.
What's new in v3.20.1570 (June 25, 2012)
- Added Windows Explorer Context Menu management to Startup tool.
- Added Windows 8 Release Preview compatibility.
- Added Opera 12 support.
- Updated History cleaning for Aurora.
- Updated History cleaning for Chrome Canary.
- Improved UAC bypass code.
- Improved accuracy for uninstall items installation date and size.
- Improved scheduled tasks detection.
- Improved cleaning algorithm duplication detection.
- Improved file and setting removal when uninstalling.
- Minor bug fixes.
ck 9.07.2012