Ccleaner 4.02.4115 64-bit Professional -2-click Run--registred- -

The "64-bit" tag in the filename is crucial. In the early 2010s, 64-bit operating systems were becoming the standard. A 64-bit specific build of CCleaner could interact more deeply with the system registry and clean up application data that 32-bit cleaners simply couldn't see. Version 4.02 was optimized for this transition, offering stability on Windows 7 and early Windows 8 systems.