This article provides an in-depth review, feature breakdown, performance analysis, and download guide for Avast Cleanup Premium version 21.4.11223. Avast Cleanup Premium is a system maintenance tool designed to automate the tedious process of cleaning and optimizing a Windows PC. The specific build 21.4.11223 (released in mid-2021) represents a mature iteration of the software, known for being free from some of the early bugs of the 21.x series while introducing refined algorithms for deep cleaning and sleep mode.
| Feature | Build 21.4.11223 | Latest Build (2026) | |---------|------------------|---------------------| | Resource usage | Light (50 MB RAM) | Heavy (120 MB RAM) | | Windows 11 optimization | Limited | Full | | Subscription model | Perpetual (if bought) | Mandatory yearly | | Telemetry | Minimal | Extensive | Avast Cleanup Premium 21.4 Build 11223
Many power users actively downgrade to Build 11223 because it lacks the aggressive cross-selling pop-ups found in newer versions. It runs quietly in the background without constantly asking you to "upgrade to Ultimate." Highly recommended for: Windows 10 users with older hardware (HDDs, 4-8GB RAM) who want a set-it-and-forget-it optimizer without monthly subscriptions. This article provides an in-depth review, feature breakdown,