dxdiag.exe

Windows ProcessMicrosoft Corporation

Also called dxdiag, directx diagnostic, directx diagnostic tool

WindowsSystem Component

DirectX Diagnostic Tool. It reports graphics, sound, and DirectX info. It is not Task Manager.

What you need to know

dxdiag is the DirectX diagnostic, not Task Manager.

dxdiag.exe walks DirectX, display, and sound devices and can save a text report. taskmgr.exe is the live process and performance view. Ending dxdiag does not close Task Manager and does not change GPU usage of other apps.

Safe?: Yes, in System32
Same as Task Manager?: No. This is a DirectX report
Can I end it?: The diagnostic window closes

Feex says

If I need a DirectX dump, I run dxdiag. I do not use Task Manager's GPU column as that report, and I do not end taskmgr to close this wizard.

What is dxdiag.exe?

dxdiag is the DirectX diagnostic, not Task Manager. It is a report tool. taskmgr.exe shows live processes and a GPU graph. Swapping those names is wrong.

What does it do?

It queries DirectX, display adapters, and audio, then shows or saves the report. It does not end other tasks and it does not replace msconfig.

Why is it running?

You ran dxdiag from Run, a support script, or a game helper. A copy that sits open is the wizard still on screen.

Is it safe?

Usually safe

System32 dxdiag.exe is Microsoft. A dxdiag.exe in a "driver pack" zip is not. This is still not taskmgr.exe.

A legitimate copy normally runs from:

C:\Windows\System32\dxdiag.exe

DirectX Diagnostic Tool
Live processes: taskmgr.exe
Expected publisher: Microsoft Corporation

Can I end it?

Closes the diagnostic

Ending dxdiag.exe closes the tool. Task Manager stays. The GPU keeps doing whatever games and apps were already doing.

Can I remove it?

Do not delete dxdiag.exe. Update the GPU driver from the vendor if that was the goal. Do not delete System32\taskmgr.exe.

Should it start with Windows?

You launch it. It should not sit in Startup Apps. A game overlay is not this tool.

Normal resource behavior

These are contextual labels, not universal averages.

CPU: Short spike while it enumerates devices
Memory: Small
Disk: Can write DxDiag.txt
GPU: Query only, not a game loop

File information

dxdiag.exe file information
Executable name	dxdiag.exe
Common legitimate path	C:\Windows\System32\dxdiag.exe
Publisher	Microsoft Corporation
Signature expectation	Signed by Microsoft Windows

Common problems

People watch Task Manager GPU while this window is open and call it a leak

Enumeration is brief. A game or browser is the usual GPU user. This exe is the report, not the renderer.

A forum "dxdiag replacement" in Downloads

The real tool is System32. Do not run a namesake zip. Task Manager is still a different exe.

Troubleshooting

Diagnose before you change anything destructive.

Save the report from the tool, then update the GPU driver

The text file is the artifact. Task Manager will not export that DirectX page.

If dxdiag will not start, check System32 signature, not taskmgr

Repair the OS or the display driver. Replacing Task Manager does not restore DirectX Diagnostic Tool.

Technical details

dxdiag.exe technical details
Image name	dxdiag.exe
Role	DirectX Diagnostic Tool

Sources and verification

Reviewed by Feex editorial. Last verified August 2026 Status: Feex Reviewed. How we research.

Microsoft Learn: DirectX · DirectX diagnostics sit with the graphics stack
Microsoft Support: Windows · dxdiag.exe is the DirectX Diagnostic Tool
Foxhole process map · First-party samples on Windows PCs. Not a lab benchmark.

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