System Optimization and Diagnostic Tool

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http://www.piriform.com/ccleaner CCleaner is the number-one tool for cleaning your Windows PC. It protects your privacy online and makes your computer faster and more secure.

CCleaner

Use Defraggler to defrag your entire hard drive, or individual files - unique in the industry. http://www.piriform.com/defraggler

Defraggler

Recuva

http://www.piriform.com/recuva Accidentally deleted an important file? Lost something important when your computer crashed?
Speccy is an advanced System Information tool for your PC.

Speccy

http://www.piriform.com/speccy

Auslogics

Carole Ann, US http://www.auslogics.com/en/
Disk Defrag is a vital maintenance tool that will improve your PC's performance by defragmenting and re-arranging files on your disk. But for even higher performance gain, try our optimization utility - Auslogics BoostSpeed.

Disk Defrag

http://www.auslogics.com/en/software/disk-defrag/

Duplicate File Fi

Daily computer activity inevitably leads to accumulating identical files on your computer, especially if you are an active PC user. You may download gigabytes of music and video files, documents and applications from the Internet, share these files with your friends and not even realize how many same files may be collected on your hard disk from such activity. Keeping unnecessary duplicates on your computer means wasting valuable hard disk space. http://www.auslogics.com/en/software/duplicate-file-finder/

Emergency Recovery

http://www.auslogics.com/en/software/file-recovery/ Recover All File Types With Auslogics File Recovery software you can recover ALL file types: documents, music, photos, videos and every other file type you can think of.

Free Registry Cleaner

Windows registry is a database that stores crucial settings and options of the Microsoft Windows operating system. Registry entries are created for each application and driver installed on your computer. http://www.auslogics.com/en/software/registry-cleaner/
http://www.auslogics.com/en/software/registry-defrag/

Defragment

The registry is very much like hard disk drives. Programs on your computer access the registry thousands of times per second. That means that the registry, just like disk drives, gets bloated and fragmented with time.

Ultimate Windows Tweaker

Ultimate Windows Tweaker v 2.1 for tweaking and optimizing Windows 7 & Windows Vista, 32-bit & 64-bit has been released. Please visit its new home page at The Windows Club . Ultimate Windows Tweaker is a freeware Tweak UI Utility for tweaking and optimizing Windows 7 and Windows Vista, 32-bit & 64-bit.

Security Process Explorer

Security Process Explorer is an enhanced task manager, that provides advanced information about programs and processes running on the computer. It displays all the standard information, including file name, directory path, description, CPU usage etc. as well as a unique security risk rating.