In Steam, open Library, right-click Call of Duty, and select Properties > Installed Files > Verify integrity of game files. Keep Warzone closed while Steam checks the installation, then let any Call of Duty download finish before launching. If Warzone reaches its menu, the repair worked; do not keep verifying files because of the message alone.
Wait for verification to finish, then open Steam > Downloads and let any Call of Duty download complete. Do not launch Warzone while Steam is still replacing files.
3
Launch Warzone once
Start Call of Duty from Steam, select Warzone, and leave the Main Menu open while Shader Preloading finishes. The repair is successful when Warzone reaches the menu and stays open without returning to the validation error.
4
Use the current PC checks if it still fails
Open Activision's Warzone PC troubleshooting page and apply the listed Windows and graphics-driver requirements for your hardware. Close only the specific conflicting programs named there, then test Warzone again.
If Steam finishes reacquiring the files but Warzone still will not reach the menu, submit an Activision PC crash report. Include the time, Steam verification result, Windows version, graphics card, driver version, and any on-screen error.
If it does not work
If Steam shows a download or disk error instead of finishing, resolve that exact Steam error before repeating Warzone verification; the replacement files have not been installed yet.
If Warzone launches normally but a later verification reacquires a small file again, judge success by the game result. The verification message alone does not identify a continuing Warzone failure.
ⓘ Sources and verification
Checked against official documentation on . Scope: Windows PC, Steam.
Source-checked against current Steam file verification and Activision Warzone PC troubleshooting. No exact current registered screenshot exists, so the complete text workflow is published without one.
