Check this cool software: RegCure Registry Cleaner. It really works for me.
Try CCleaner OR AML Free Registry Cleaner (www.amlsoft.com) OR Eusing Free Registry Cleaner (Eusing Software).
All of them are FREEWARE.
I used all of them and currently using CCleaner (for junk file cleaning and registry cleaning) and AML Free Registry Cleaner and Satisfied.
Hello, there are many online or offline available PC Cleaners and Registry Files Cleaners like C Cleaner, Optimo Pro, JetClean and many more which easily repair registry errors and remove junk files.