Avast Cleanup Premium | 21.4 Build 11223

is a PC optimization tool designed to remove junk files, fix registry issues, update software, and improve system performance. Version 21.4.11223 is part of the 2021 release cycle, stable on Windows 7, 8, 8.1, and 10.

Deducted 0.8 for the persistent upsells and background resource usage. Avast Cleanup Premium 21.4 Build 11223

This build is particularly noteworthy for its —fewer critical system files flagged for deletion—a common pain point in earlier cleanup utilities. is a PC optimization tool designed to remove

The registry cleaner in Build 11223 is conservative—it only removes keys that are clearly orphaned (e.g., references to uninstalled software). It includes a full backup and restore point creation before any changes, a critical safety net that newer versions have buried behind menus. This build is particularly noteworthy for its —fewer

Avast leads in automation (Sleep Mode, delayed startup) and safety features, while CCleaner is lighter but less intelligent. System Mechanic offers deeper tweaks but is more technical.

If you have an old installer or license key for this specific build, follow these steps:

To evaluate Build 11223, I tested it on three systems: