If Call of Duty’s shader compilation is still moving, let it finish before starting a match. If the percentage has stopped changing, verify the game files in Steam, then use the game’s own shader-preloading restart control if that title provides one. These are cautious troubleshooting steps, not guaranteed fixes; shader labels and menus vary by release.
Is shader compilation actually stuck?
Shader preparation can be a normal first-boot step, and some releases also run it after updates. Record the game title, displayed percentage, elapsed time, whether this is the first launch or followed an update, and whether the indicator changes. There is no universal time limit that proves a Call of Duty shader process is frozen.
Activision describes Shader Preloading as an important part of first boot and warns that starting a mode before it completes can affect performance. Its older Modern Warfare PC support page gives average durations from 8 minutes 2 seconds to 37 minutes 12 seconds across six example configurations. Those are historical averages for the listed systems, not a current benchmark or a deadline for another release or PC. Activision’s Modern Warfare PC guidance
Modern Warfare 4 Beta is a special case
Call of Duty Staff’s August 19, 2026 article says the Modern Warfare 4 Beta on Steam needs a one-time shader compile on first boot, then uses shader preloading after subsequent updates. This behavior is specific to that Beta and should not be assumed for other Call of Duty titles. Call of Duty: Modern Warfare 4 Beta PC settings
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Try these Steam troubleshooting steps
- Let visible progress finish. If the indicator is changing, wait for shader preparation to complete before entering a mode or matchmaking. Interrupting a functioning process can leave you without the expected performance benefit.
- Verify the game installation. In Steam, open Library, right-click Call of Duty, choose Properties, select Installed Files, then choose Verify integrity of game files. This is community-reported advice, not an Activision-confirmed fix. Steam Community users report mixed results. Steam Community discussion about shaders stuck at 0%
- Restart shader preloading, if your game offers the control. In the game, look under Settings → Graphics for Restart shaders pre-loading (wording may differ). Restart the game afterward and allow the process to complete before matchmaking. This step is also community-reported and has mixed outcomes; menu location and availability depend on the release and patch.
- Escalate if it remains unresolved. Contact Activision through its support destination linked from the Steam listing. Call of Duty on Steam
What to include when contacting Activision
Give support enough detail to distinguish a slow preparation step from a repeatable stall:
- Exact Call of Duty release or edition and that you are playing on Steam.
- Whether this is first boot or followed a game update.
- The percentage shown, how long you have observed it, and whether it changes.
- Whether Steam file verification completed and whether you restarted shader preloading.
Do not treat a single elapsed time as proof of failure: the official Modern Warfare examples are configuration-specific and do not establish a universal cutoff or remedy for a frozen percentage.
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