Current patch: EA.1
Last verified: Sep 1, 2026
Release date: Oct 23, 2026
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MW4 errors and troubleshooting

A source-linked checklist for common connection, install, account, and platform issues in Modern Warfare 4.

Connection errors

Check Activision service status, platform network status, NAT type, and the latest patch before changing local settings.

PC requirements

TPM 2.0, Secure Boot, SSD storage, driver version, and shader preloading are separate checks. Record which one failed.

Account and crossplay

Crossplay and account linking issues can vary by platform. Keep the exact error text and platform in any report.

Report a problem

Use the report link on every page so corrections can be attached to a specific entry and source.

Archive references

Read the underlying notes

These related MW4 pages carry the source detail behind this summary.

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