1)   Windows System Optimizer - Free Edition 2.0
Windows System Optimizer Free Edition is an optimizer software that speeds up your system, giving you maximum performance. It includes cleanup tools for Windows system.
License:Freeware, $ to buy Size: 1925KB

2)   Error Killer 2008.012
ErrorKiller is a Windows Registry Cleaner, Kernel32 DLL Error Message Fix and Access Violation Repair Software. Repair Errors related to missing startup and dll files, invalid device drivers, application paths, shortcuts and associations. - FREE SCAN
License:Shareware, $19.95 to buy Size: 2360KB

3)   Free Windows Registry Cleaner 1.0.0
Free Windows Registry Cleaner is a 100% free utility that removes registry errors from your computer. Registry errors occur for many reasons, including incorrect uninstallation, incorrect removal of software or corrupt hardware drivers.
License:Freeware, $0.00 to buy Size: 869KB

4)   Fix My Registry 2.5
The Windows Registry is a crucial part of your PC's operation system. Regular use of computer makes the registry fragmented and cluttered with obsolete and invalid data. Fix My Registry keeps this critical part of your PC in perfect condition!
License:Freeware, $0.00 to buy Size: 1066KB

5)   Free Window Registry Repair 1.5
Free Window Registry Repair is a freeware to safely search inside your entire Windows registry for any invalid entries and repair them. It can automatically backup any repairs made to restore the Registry back to the previous registry state.
License:Freeware, $0 to buy Size: 770KB

6)   Registry Trash Keys Finder 3.8.0
RTKF puts powerful registry cleaning tools into your hands. It quickly finds unwanted registry data. You may then safely strip out orphaned keys and other "rubbish" that's frequently left behind by "trial" software.
License:Freeware, $ to buy Size: 314KB

7)   Clean My Registry 4.6
The Windows Registry is a crucial part of your PC's operation system. Regular use of computer makes the registry fragmented and cluttered with obsolete and invalid data. Clean My Registry keeps this critical part of your PC in perfect condition!
License:Freeware, $0.00 to buy Size: 2063KB

8)   MISPBO Free Registry Cleaner 3.0
MISPBO Free Registry Cleaner is an advanced registry cleaning tool. The main function of is to allow the removal of unnecessary keys from the Windows Registry.It can also backup and defrag the registry.
License:Freeware, $ to buy Size: 1056KB

9)   Go Registry Mechanic 5.2
Safely clean, repair and optimize the Windows registry with a few simple mouse clicks! Problems with the Windows registry are a common cause of Windows crashes, slow performance and error messages. Make your system more stable.Improve the performance
License:Shareware, $29.95 to buy Size: 3351KB

10)   RegCure 2008.254
RegCure, the Advanced Registry Cleaner. Windows Errors Have Met Their Match! RegCure offers the most comprehensive feature set on the market. RegCure is the PC fix preferred by PC users. Scan your computer for errors, FREE! - FREE DOWNLOAD.
License:Shareware, $29.95 to buy Size: 966KB

1)   Registry Cleaner 4.7
Registry Cleaner is a proven high-performance tool which allows you to safely clean and repair registry problems with a few simple mouse clicks. Scan, Repair and Speed up your PC.
License:Shareware, $25 to buy Size: 1288KB

2)   Registry Fix (Windows Fixer) 2008.06
Registry Fix will scan and fix your system registry and hard drive for invalid file and system references. These invalid references may cause system instability, PC errors, constant crashes, and general system slowdowns.
License:Shareware, $37 to buy Size: 3076KB

3)   RegCure Advanced 1.5.0.7627
RegCure, the Advanced Registry Cleaner. Windows Errors Have Met Their Match! RegCure offers the most comprehensive feature set on the market. RegCure is the PC fix preferred by PC users. Scan your computer for errors, FREE! - FREE DOWNLOAD.
License:Shareware, $29.95 to buy Size: 1051KB

4)   Smart PC Professional Demo 4.7
Smart PC Professional makes your PC faster, error-free and more efficient! Special features of the new software ensure your personal privacy while surfing through the Web and protect your PC from information theft.
License:Freeware, $0.00 to buy Size: 1214KB

5)   Registry Defender Platinum 4.0.2
Find and repair registry errors, cleanup unneeded files, defragment your drive, backup system files, and more! Registry Defender Platinum is a powerful system diagnostic utility that helps you optimize system performance.
License:Shareware, $29.95 to buy Size: 2718KB

6)   Free Professional Registry Doctor 5.2.1
Free Professional Registry Doctor is an easy and comprehensive application to keep your PC running cleaner, faster, and error-free!
License:Shareware, $29.95 to buy Size: 2343KB

7)   Registry Repair Service 1.0
Your XP/2000 system displays the following error message: Stop error c0000218. Windows could not start because the following file is missing or corrupt: WINDOWSSYSTEM32CONFIGSOFTWARE That means that the Software Registry Hive is corrupted.
License:Data only, $30 to buy Size: KB

8)   RegDoctor 2.02
RegDoctor can safely and quickly clean and repair Windows registry problems with a few simple mouse clicks! It uses an intelligent, high-performance detection engine to accurately identify missing and invalid references in your Windows registry.
License:Shareware, $29.95 to buy Size: 2180KB

9)   RegistryEasy 2008.6
RegistryEasy is an award-winning Windows Registry Cleaner that scans your PC and safely cleans errors & invalid entries that cause system slowdowns,freezing and crashing.RegistryEasy repairs registry problems to make your computer run like new again!
License:Shareware, $34.95 to buy Size: 3076KB

10)   Premium Booster 2.9.0.3000
Premium Booster will optimize your PC in just a few easy steps. You will quickly notice that its magic really works and that your Windows becomes more stable if you keep using Premium Booster.
License:Shareware, $26.95 to buy Size: 4359KB