Avast Cleanup Premium 21.4 Build 11223 Page

Click Menu (three lines) → Settings:

Note: A 14-day free trial is available without a code.

Once opened, you see:

Avast Cleanup Premium 21.4 Build 11223 is not a revolutionary product, but it is an exceptionally polished one. It successfully automates the boring, repetitive tasks of PC maintenance—cleaning temp files, updating software, disabling bloatware, and hibernating runaway processes—while keeping safety rails firmly in place.

The build’s improvements over earlier versions (better browser cleaning, improved sleep mode reliability, and fewer false positives) show that Avast is listening to user feedback. It does not promise to turn a 10-year-old Pentium into a gaming rig, but it will make that same Pentium boot faster, run cooler, and crash less often. Avast Cleanup Premium 21.4 Build 11223

For the average user, the $39.99 annual subscription is justifiable if you value time and convenience over manual tinkering. For power users, it’s a convenient backup tool for cleaning client PCs or family machines.

Rating: 4.2 / 5
Deducted 0.8 for the persistent upsells and background resource usage.

Last tested: November 2021 on Windows 10 21H2 and Windows 11 RTM. Avast Cleanup Premium 21.4 Build 11223 remains stable and effective as of this write-up, though newer builds (22.x and 23.x) have since introduced additional features like disk defragmentation and driver updater.

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. Click Menu (three lines) → Settings :

Unlike the free version of Avast Antivirus, this premium tool focuses exclusively on performance—not security. It targets:

In the modern digital ecosystem, few things are as frustrating as a once-speedy computer gradually succumbing to the clutches of digital decay. Over time, every Windows PC accumulates a digital landfill: orphaned registry entries, fragmented hard drives, redundant temporary files, forgotten browser caches, and resource-hungry background applications. This degradation manifests as sluggish boot times, stuttering application launches, and the dreaded spinning wheel of death.

Enter Avast Cleanup Premium 21.4 Build 11223—a mature iteration of one of the most trusted names in system optimization. Released during a transitional period for Windows 10 and the dawn of Windows 11, this version represents a refined balance between aggressive cleaning and intelligent safety. This write-up explores its features, underlying technology, performance impact, user experience, and standing in the crowded PC optimization market.

A signature feature. Sleep Mode identifies applications consuming over 10% CPU or 200MB RAM while running in the background for more than 10 minutes without user interaction. It then suspends them (like Windows’ own “Eco mode” but more aggressive) and resumes them instantly when you click their window. Note : A 14-day free trial is available without a code

Build 11223 improved the exception list—users can permanently exclude apps like Steam downloads, Slack, or Zoom from being slept.

How does this older build stack up against modern alternatives?

| 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 |

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."