You press play on Call of Duty's new title, Call of Duty: Modern Warfare 4, and nothing appears. Or the window closes during loading. Or you get dropped to the desktop in the middle of a match. Right now the game is in Campaign Early Access for people who pre-ordered, which started on October 16, and the full game releases on October 23 at midnight local time, while the Steam store page lists October 22. That mix matters, because a lot of the fixes you will find were written during the August open beta or against a pre-release client, and hotfixes after launch can change the picture again. This guide only covers the launch and crash side of things, checked directly against Activision's official support articles and the Steam store page on October 17, 2026. The first job is to split the symptom into four buckets: the game never starts, the game starts and then crashes or freezes, the game runs but every online mode is blocked, or the download and install stalls. After that we follow the order official support actually prescribes, driver versions first, then shader preparation and Advanced Shader Delivery, then isolating software that can interfere. Finally, if none of it helps, we look at what to write down when you contact support and how to keep video of the moment it happened. Raising frame rates by changing graphics options is a separate subject, covered in Modern Warfare 4 best settings; performance here covers just the network side of stutter that the official lag article describes.
Bottom line: split the symptom, then check drivers, shaders, and interfering software in that order
The official crash article was updated on October 16, 2026. For PC it says most crashes happen while you are attempting to launch the game or while playing in public Multiplayer matches. The checks it lists are plain: keep the PC in a cool, well-ventilated place, make sure it meets the minimum system requirements, shut down all applications running in the background, and update video card drivers to the recommended versions. It also carries a warning that is easy to skim past: third-party applications such as input remapping software, overlays, and recording software may interfere with gameplay or disrupt the game's boot process even if they are not running when you boot or play, and it suggests uninstalling those kinds of applications if crashes persist. So a sensible order is three steps. Match the drivers to the recommended versions, let shader preparation and any pending update finish, then reproduce the crash with every overlay, remapper, and recorder closed. If it stops happening, bring them back one at a time until the culprit shows itself. If your symptom is really that every online mode is blocked, this is not a crash at all. The official requirements page and the Steam store both state that TPM 2.0 and Secure Boot are required, and the dedicated requirements article explains that an unmet setup is restricted from online game modes. Steam adds that a mobile phone number must be linked to your Steam account to play. In that case your time is better spent on the Windows version, the BIOS boot mode and Secure Boot state, and the disk partition style; the three official spec tiers and the TPM 2.0 and Secure Boot conditions are set out in the Modern Warfare 4 system requirements. If the download or install stalls instead, start with free space: all three official spec tiers ask for an SSD with 115 GB available at launch, and the page notes that mandatory updates may need more. If you want to see whether other players have the same symptom, the criteria for picking an active community are in how to find a game Discord server. Do not lean on community posts for error-code meanings, though. As of October 17, 2026 the official Modern Warfare 4 articles do not publish a PC error-code list, and only one console code appears as an example. If you get a code, quote it exactly in a support ticket. And if the game simply will not run for you and refunding is on the table, know the rules first: playtime and purchase-window limits are summarized in how to get a Steam refund.
How to work through a Modern Warfare 4 launch problem
- 1Sort the symptom into one of four bucketsDecide whether the game never starts, starts and then crashes or freezes, runs fine but blocks every online mode, or stalls while downloading and installing. The causes and the checks differ for each one, so running through a generic fix list without sorting first wastes an evening. An online-mode lockout in particular will not change no matter how many times you reinstall a driver.
- 2Match your video card driver to the recommended versionAs of October 17, 2026 the official requirements page lists AMD 26.7.1, NVIDIA 616.56, and Intel 32.0.101.8974. The same page says an ASD-compatible NVIDIA driver will be made available on October 21, before launch, so check again around release day. Reboot after the driver install and see whether the same symptom survives before you change anything else.
- 3Re-read the global requirements, not just the GPU listOfficial support states that every spec tier needs a broadband internet connection and DirectX 12 compatibility, that only Intel and AMD processors with the AVX instruction set are supported at this time, and that Intel Arc GPUs require Resizable BAR. Storage is an SSD with 115 GB available at launch for all three tiers, with more possibly needed for mandatory updates. On an older CPU, check AVX support before anything else.
- 4Let shader preparation and updates run to the endIf you see a shader preparation screen on first launch or after a large update, leave it alone until it finishes. The official PC blog describes Advanced Shader Delivery as delivering precompiled shaders ahead of time on supported PC platforms so the game launches faster, and says to install the XBOX PC app in advance whichever platform you play on if you want to use ASD. If you do not want ASD, that app is not required.
- 5Reproduce the crash with interfering software closedOfficial support warns that third-party input remapping software, overlays, and recording software may interfere with gameplay or disrupt the game's boot process even when they are not running, and suggests uninstalling them if crashes persist. If you use DOR, close it for this test too. When the crash stops, re-enable one app at a time so you learn which one caused it instead of guessing.
- 6If it survives, check server status and write a reproducible reportThe official connection article says to check Modern Warfare 4 Server Status first when you cannot get online. Status changes by the minute, so read it on Activision's own online services status page rather than trusting a static list. The official bug reporting article asks for what happened, where and when it happened, and the steps to reproduce it. Video of the session makes those steps much easier to write accurately.
Modern Warfare 4 symptoms and what to check (official sources, October 17, 2026)
| Symptom | What to check first | Official guidance? |
|---|---|---|
| Nothing happens on play, or the window closes during boot | Match the video card drivers to the recommended versions (AMD 26.7.1, NVIDIA 616.56, Intel 32.0.101.8974), close every background application, then launch again. | Yes. These are the exact checks in the crash article updated October 16. |
| Crashes during play, especially in public Multiplayer matches | Confirm the PC is in a cool, well-ventilated spot and meets the minimum requirements, then reproduce with overlays, input remappers, and recording software closed. | Yes. The article states PC crashes mostly occur at launch or in public Multiplayer matches. |
| Stuck on shader preparation, or an endless loading screen | Let the preparation finish and install any pending update first. If you want Advanced Shader Delivery, install the XBOX PC app beforehand. | ASD is official. The claim that interrupting shaders causes endless loading is not official. |
| Game launches but every online mode is blocked | This is a requirement problem, not a crash. Check TPM 2.0 and Secure Boot, the Windows version, BIOS boot mode and disk style, and link a phone number to your Steam account. | Yes. Stated on the official requirements pages and on the Steam store page. |
| Download or installation stalls partway | Free up 115 GB or more on the SSD plus room for updates, restart the store client, and verify the integrity of the game files. | 115 GB and extra update space are official. There is no PC-specific install-stall article. |
| Rubber banding, stuttering, hit marker delays | Check the official online services status first, move to wired Ethernet, enable router QoS, and stop downloads or video streams that eat bandwidth. | Yes. The official lag article names these three symptoms and recommends the same steps. |
Before you open a support ticket
- Drivers match the recommended versions and the PC has been rebooted since.
- The SSD holding the game has 115 GB or more free, plus headroom for updates.
- DirectX 12, an AVX-capable CPU, and Resizable BAR for Intel Arc are all confirmed.
- Shader preparation and pending updates were allowed to finish without interruption.
- The crash was tested with overlays, input remappers, and recording software closed.
- For an online-only lockout, TPM 2.0, Secure Boot, the Windows version, and the linked Steam phone number were checked.
- Footage of the symptom is protected in the library and the reproduction steps are written down.
Keeping video of the crash with DOR
DOR is a free Windows PC app. Call of Duty is on its supported list as a full-session game, so titles launched through Call of Duty HQ are recorded automatically from start to exit as a single video. If the game does not appear in the list, check Settings > Games. When something worth keeping just happened you press F8 and the previous 30 seconds is saved as a clip; the length can be set to 15, 30, 45, or 60 seconds. Crashes are the awkward case. When the game process dies, the session recording ends with it. What you can do is open the library before you relaunch, trim the tail of the session that just ended, or like that session so automatic cleanup leaves it alone. Full-session videos live in their own share of the storage limit, 5 GB by default or 5 percent of the limit if that is larger, and cleanup removes the oldest sessions inside that share while skipping the newest session and anything you liked. That footage is what lets you answer the official bug report questions about what happened, where, when, and in what order. Watch free space as well. DOR warns when the drive drops below 30 GB and will not start, or will stop, a recording below 20 GB, and Modern Warfare 4 asks for 115 GB at launch, so a fresh install can push you across that line. If you record with Steam's own capture instead, its background recording space and drive settings are covered in fixing low disk space for Steam game recording. Set resolution, frame rate, and clip length before you launch. The official crash article names recording and overlay software as things that can disrupt the boot process. While you are still chasing a crash, test with DOR closed too, and turn it back on once you know what the cause was.
