SC System Tuner Extends your operating system's capabilities: Drive Cleaner, Registry Cleaner, Internet Cleaner, DLL Cleaner, Internet Tuneup, StartUp Tuner, File shredder. Free up valuable space on your hard drive, makeWindows faster, more secure & comfortable. Optimizes the performance of your PC, corrects problems, and helps you customize your system to suit your needs. Removes unnecessary files from your drives. Best of all it is free!