here the list of better registry cleaner & windows optimizer of 2011. i think it will be helpful to you.
1. CCleaner
Powerful registry cleaner
Uninstall programs option
Editing your startup programs
System Restore
Disk Wiper
Exporting some settings to .txt file
Cookies cleaner
Including and excluding additional folders that you wish Cleaner t remove
Saving all settings INI file
Browser history, cookies and browsing data cleaner
Advanced settings.

2. Macecraft Power Tools Lite
Automatically clean your Windows registry.
Automatically fix many kinds of registry errors, such as broken file references.
Detect and remove unneeded history data, MRU, etc.
Delete temporary and junk files.

3. Rizone’s Power Tools
4.
5. Reg Seeker
Registry Cleaner
Program Uninstaller
Tweaks
Backup Option
Startup Entries
History
Favorites
Printing Option

6. Iobit Toolbox

7. Slim Cleaner

8. Jet Clean

9. PC House Keeper
Cache Cleaner
History Cleaner
Cookie Cleaner
Registry Cleaner
File Shredder
Startup Manager
Program Uninstaller
Process Explorer
Disk Cleanup Tool
IP Port Scanner
TCP Connections Viewer
MAC Address Changer
MAC Address Scanner.

10. Combo System Cleaner