You open After Effects on your Copilot+ laptop, drop in a composition, hit the spacebar for a RAM preview — and the app freezes, crashes to the desktop, or renders a timeline full of red error frames. On an Intel machine the same project hums along. On ARM, After Effects is the Adobe app most likely to remind you that you are running on a different architecture.

The trouble is rarely one thing: an emulated effects engine, a GPU preview path tuned for NVIDIA drivers, a media cache that fills a small SSD, and third-party effects compiled only for Intel.

This guide gives you six fixes in technician order: confirm the build, stabilize the GPU path, clear the cache and memory pressure, isolate bad effects, fix the Media Encoder handoff, and do a clean reinstall when nothing else holds.

Why this happens

  • Emulated effects engine: Large parts of After Effects still run as x64 code under Prism emulation on Windows on ARM, which multiplies the cost of every frame render and makes timing-sensitive features (preview, audio sync) flaky.
  • GPU acceleration versus the ARM driver: Mercury GPU acceleration and hardware-accelerated decoding were validated against Intel, NVIDIA, and AMD desktop drivers. On Adreno and mobile Radeon drivers they can produce wrong frames, hangs, or outright crashes.
  • Media and disk cache filling the drive: After Effects writes gigabytes of preview cache. Copilot+ laptops often ship with modest SSDs, and a full cache disk produces freezes and “cache” errors that look like app bugs.
  • Intel-only third-party effects and scripts: Plugins from smaller vendors are frequently x64-only. They can crash the render thread the moment a frame containing them is processed.
  • Dynamic Link fragility under emulation: Sending a composition to Media Encoder relies on inter-process communication that is noticeably less reliable when one or both apps are emulated.
  • Power and thermal throttling during renders: Long renders push sustained load that ARM laptops handle by throttling — and a throttled, emulated render thread is the perfect recipe for timeouts. Checking NPU and CPU power behavior helps you see what the machine is actually doing under load.

How to fix it

Work through these in order — diagnose first, then act.

Fix 1: Confirm the build and update everything Adobe

Before changing a single setting, make sure you are not fighting a stale or wrong-architecture install. Adobe updates these apps constantly, and ARM support improves with nearly every release.

  1. Open the Creative Cloud desktop app and install every pending update — for the CC app itself first, then After Effects and Media Encoder.
  2. In After Effects, check Help > About After Effects and note the build; if a native ARM64 build is offered in the CC app, install it and remove the x64 build.
  3. Update third-party plugins from each vendor’s site — running 2023-era plugins inside a 2026 app on an emulated architecture is asking for crashes.
  4. Restart the laptop after the updates so no old Adobe background process survives.
  5. Open a new blank project and test a RAM preview before opening your real project — this tells you whether the app itself is healthy.
  6. Only after the blank project previews cleanly should you open the problem project; if the problem project still fails, the issue is in the project (effects, footage, cache), not the install.

Fix 2: Stabilize the GPU and preview pipeline

Most preview crashes trace to the GPU path. After Effects gives you fine-grained control over hardware acceleration — use it to find a stable configuration rather than accepting the defaults.

  1. Go to File > Project Settings and set the renderer to Mercury Software Only (no GPU) as a diagnostic step.
  2. Test a RAM preview — if it is now stable, the GPU driver was the problem; if it still crashes, skip to Fix 3 (cache and memory).
  3. With software rendering stable, open Preferences > Preview and lower the preview resolution to Half or Third and shorten the preview duration — less work per preview means fewer timeouts.
  4. Update the graphics driver from your OEM’s support page (Dell , HP , Lenovo ) — not Windows Update’s generic driver — then cautiously re-enable GPU acceleration and retest.
  5. If GPU acceleration crashes again after the driver update, leave it on Mercury Software Only permanently; on modern ARM chips software rendering is slower but dependable.
  6. Disable Hardware Accelerate Composition, Layer, and Footage Panels under Preferences > Display if panel glitches persist — these fail independently of the renderer setting.

Fix 3: Purge the cache and relieve memory pressure

A bloated or corrupted media cache is the number-one cause of “it worked yesterday” failures. After Effects also assumes generous RAM; on a 16 GB Copilot+ machine you must manage it deliberately.

  1. Go to Edit > Purge > All Memory & Disk Cache and confirm — this clears corrupted preview files without touching your project.
  2. Open Preferences > Media & Disk Cache and check the cache location and size: point it at your fastest internal SSD with at least 50 GB free, and cap the maximum disk cache size sensibly.
  3. In Preferences > Memory & Performance, reserve at least 4–6 GB for other applications so Windows itself never starves during a render.
  4. Close the browser, Slack, and every other heavy app before a long preview or render — on 16 GB machines, background apps are the difference between a finished render and a crash.
  5. Split very long compositions into shorter pre-comps rendered separately; a single two-hour timeline is far more likely to hit a memory ceiling than four thirty-minute segments. If Windows itself is unstable under sustained load, rule out platform issues with a Safe Mode boot .

Fix 4: Isolate crashing effects and plugins

When one specific layer or effect kills the render every time, the effect — not After Effects — is broken. Binary-search your timeline to find it.

  1. Duplicate the project (so the original stays intact), then in the copy, solo the layers in halves: disable the bottom half, preview, then the top half — the crashing half contains the culprit.
  2. Repeat the halving inside the bad half until one effect or layer is isolated.
  3. Check that effect’s vendor for an update or an ARM64 build; many smaller plugin makers now ship ARM-native versions quietly.
  4. If no update exists, replace the effect with a built-in alternative or pre-render that layer on another machine and import the result as footage.
  5. For expressions and scripts that misbehave, toggle Enable Expressions off in Preview preferences temporarily — some legacy expressions assume Intel timing behavior.
  6. Keep a short “do not use on ARM” list for your workflow so the next project does not rediscover the same crashing effect.

Fix 5: Fix the Media Encoder handoff

Queueing a composition to Media Encoder and watching it fail is a special frustration. The dynamic link between emulated apps is the weak point — sidestep it by rendering an intermediate file.

  1. In After Effects, add the composition to the Render Queue (not Media Encoder) and render to a high-quality intermediate: QuickTime with ProRes or an image sequence.
  2. If the Render Queue itself fails, the problem is in the composition — go back to Fix 4 rather than blaming Media Encoder.
  3. Once the intermediate file renders cleanly, import it into Media Encoder and encode your delivery format from there.
  4. Keep both apps updated in lockstep — version mismatches between After Effects and Media Encoder break dynamic link even on Intel.
  5. If you must use dynamic link, close all other Adobe apps first; each additional linked app multiplies the inter-process traffic that emulation already slows down. And if Media Encoder seems to launch wrong, check its taskbar pin — stale shortcuts cause surprising “won’t start” reports.

Fix 6: Clean-reinstall After Effects and Media Encoder

When the app crashes on a blank project with a purged cache and software rendering, the installation is corrupt. Reinstall properly — in the right order, with leftovers removed.

  1. Uninstall After Effects and Media Encoder from the Creative Cloud desktop app.
  2. Manually delete leftover folders under C:\Program Files\Adobe and the Adobe folders in AppData\Local, AppData\Roaming, and Documents\Adobe.
  3. Restart the laptop to clear locked services and background processes.
  4. Install the latest Creative Cloud desktop app fresh, let it detect ARM64, then install After Effects and Media Encoder from it.
  5. Before restoring anything, test a blank-project RAM preview and a short render-queue export.
  6. Reintroduce plugins one vendor at a time, testing between each — the clean install is your chance to leave the crashing plugin behind permanently.

Closing

After Effects on an ARM laptop demands a more defensive workflow than on Intel: confirm the build, keep GPU acceleration only if your driver earns it, manage cache and RAM actively, isolate Intel-only effects, and render intermediates instead of trusting dynamic link. It is extra work, but it turns a crashy app into a usable one.

Frequently asked questions

Does After Effects work on Windows ARM laptops?
It installs and runs on Windows 11 on ARM through a mix of native ARM64 components and x64 emulation, but it is one of the least ARM-friendly Adobe apps. Expect to manage GPU settings, keep drivers current, and disable a few hardware features for stability.
Why does After Effects crash during RAM preview?
Preview crashes usually come from GPU acceleration hitting an incompatible ARM graphics driver, an overfilled media cache, or the composition exceeding available RAM. Disable GPU acceleration, purge the cache, and lower preview resolution first.
Why does Media Encoder fail when I queue from After Effects?
The dynamic link between the two apps is fragile under emulation. Render to an intermediate file from After Effects first, then encode that file in Media Encoder, instead of sending the composition directly.
Can I make After Effects faster on a Snapdragon laptop?
Somewhat. Use the native ARM64 build if offered, turn off GPU features that crash, keep the disk cache on a fast internal SSD, and close background apps. Heavy 3D and particle work will still be slower than on a comparable Intel or NVIDIA machine.