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Mirillis Action! 4.48.1 (released April 24, 2026) is the leading high-performance screen recording and live streaming solution, optimized for the latest generation of Windows 11 hardware. This update solidifies its status as the only screen recorder offering native HDR10+ and 8K Ultra HD support across all modern GPUs, ensuring that gamers and professional creators can capture footage with the highest possible fidelity. The 4.48.1 build specifically introduces AI-powered Background Removal for webcams without the need for a green screen, alongside an improved 360fps Slow Motion capture mode, allowing users to create ultra-smooth cinematic replays directly from their gameplay sessions.
Regarding “Crack” or “Serial Key” searches for Action! 4.48.1, it is important to note as a helpful peer that the software now utilizes a server-side “Smart Activation” model. Many of the 2026 flagship features—specifically the Remote PC Gaming (via Remotly integration), Live Streaming Overlays, and the new AI Background Removal—require a secure, authenticated connection to Mirillis servers to function. A “cracked” version typically severs these links, rendering the most advanced recording and streaming tools non-functional. Furthermore, unauthorized installers for high-speed video codecs are frequent carriers of GPU-mining malware that can permanently degrade your system’s performance. For a secure and professional experience, Mirillis offers a fully functional 30-day free trial and a one-time purchase license that includes lifetime updates for the version 4.x branch legally.
Key Features:
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8K & HDR10 Support: The only screen recorder capable of capturing 8K Ultra HD and High Dynamic Range (HDR) video with zero performance lag on RTX and Radeon hardware.
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AI Background Removal: Remove your webcam background instantly using built-in artificial intelligence, perfect for streamers who don’t have a physical green screen.
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360fps Slow Motion: Record gameplay at ultra-high frame rates to create stunning slow-motion effects during post-production or for social media highlights.
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Remote PC Gaming (Remotly): Integrated support for the Remotly app, allowing you to stream and play your PC games on your Android or iOS devices in 4K.
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Multi-Layer HUD: A professional on-screen display that monitors FPS, recording status, and web widgets (like chat boxes) without needing a second monitor.
What’s New?
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Native Windows 11 v24H2 Optimization: Full compatibility with the 2026 Windows 11 kernel, ensuring the lowest possible CPU and GPU overhead during 4K/8K recording.
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Enhanced AI Denoising: New microphone algorithms that filter out keyboard clicks and background fan noise while preserving the natural clarity of your voice.
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Automatic Recording Recovery: A new failsafe system that automatically repairs and recovers corrupted MP4 files in the event of a power outage or system crash.
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DirectX 12.2 Support: Updated capture engine for the latest 2026 gaming titles, providing seamless recording for games utilizing the newest DirectX features.
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Real-Time On-Screen Drawing: An improved drawing panel that works in any borderless windowed game, allowing for instant annotations during tutorials or streams.
System Requirements:
| Component | Minimum Requirement | Recommended (8K / HDR) |
| Operating System | Windows 8.1 / 10 / 11 | Windows 11 (v24H2) |
| Processor | Intel Celeron 1.4GHz (SSE2) | Intel i9 / Ryzen 9 (8-core+) |
| RAM | 1 GB | 16 GB or more |
| GPU | DirectX 9.0c Compatible | RTX 40/50-series or RX 7000+ |
| Storage | 100 MB for App | NVMe Gen5 SSD (for 8K data rates) |
How to Install?
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Official Setup: Download the official Action! 4.48.1 installer (action_4_48_1_setup.exe) from the Mirillis Download Center.
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Installation: Run the installer and choose your preferred language. The setup will automatically configure the FIC (Fast Intra Compression) codec for your GPU.
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Activation: Launch Action! and click the “Key” icon. Sign in with your account or enter your serial number to activate the AI Background Removal and Remote Gaming features.
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Trial Mode: If you don’t have a key, you can select “Start 30-day Trial” to access all Pro features with no credit card required.
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HUD Setup: Go to the “Settings” menu to customize your HUD position and ensure “Hardware Acceleration” is set to your primary GPU (NVIDIA, AMD, or Intel).