Photoshop 27.5.0 background removal causes complete PC crash.

An additional comment on resetting preferences, which always should be the very first thing to try:

Preferences contain a lot more than your own user settings - it’s the complete application configuration, including hidden and system-dependent parameters. Corrupt preferences usually look like application bugs, and can cause erratic behavior, failures and crashing.

Preferences are vulnerable to corruption because they are rewritten on every application exit, as opposed to read-only program files. An irregular shutdown can cause corruption. Small errors will accumulate, and may lay latent until new code in an update causes them to surface.

The safest way to do a complete reset is to move the whole Adobe Photoshop 2026 Settings folder to your desktop, so a fresh one can be built on next launch. This will return Photoshop to clean, out-of-the-box factory state. 

(System) > Users > your name > Appdata > Roaming > Adobe > Adobe Photoshop 2026

A reinstall in itself will not reset preferences (preferences are stored separately from the program files). But a reinstall will rule out a corrupt install, which can also happen.

Some steps from Google’s AI search:

The error code 0xc0000409 (STATUS_STACK_BUFFER_OVERRUN) in Adobe Photoshop typically occurs when a program process writes data beyond the allocated buffer on the stack, causing an immediate crash to prevent potential security exploits. While the message mentions a "malicious user," it is most often caused by a software bug, corrupted system files, or outdated drivers rather than an actual attack. 

To resolve this issue, follow these steps in order:

1. Run System Repair Commands

Corrupted system files often trigger this stack buffer error. Use Windows' built-in tools to repair them: 

1. Open the Start Menu, type cmd, right-click it, and select Run as Administrator.
2. Type sfc /scannow and press Enter. Wait for the verification to reach 100%.
3. If errors persist, run these DISM commands in the same prompt:
   • DISM /Online /Cleanup-Image /ScanHealth
   • DISM /Online /Cleanup-Image /RestoreHealth 

      

2. Update Graphics Drivers and Visual C++ Runtimes 

Outdated low-level software is a common culprit for buffer overruns: 

• GPU Drivers: Perform a clean installation of the latest drivers for your graphics card via the NVIDIA, AMD, or Intel website.
• Visual C++ Redistributables: Adobe applications rely heavily on these runtimes. Download and install the latest versions from the Official Microsoft Download Center. 
  Latest Supported Visual C++ Redistributable Downloads | Microsoft Learn

3. Reset Photoshop Preferences and Plugins 

If the crash occurs at startup, local settings or third-party plugins may be corrupted: 

• Launch without Plugins: Hold the Shift key while launching Photoshop and select "Yes" to skip loading optional and third-party plugins.
• Reset Preferences: Follow the official guide on the Adobe Help Center to manually reset your preferences. 

  Reset preferences

4. Perform a "Clean Boot" 

To determine if another background application (like antivirus or system utilities) is interfering with Photoshop: 

1. Press Win + R, type msconfig, and go to the Services tab.
2. Check Hide all Microsoft services, then click Disable all.
3. Go to the Startup tab, open Task Manager, and disable all startup items.
4. Restart your computer and try launching Photoshop again. 

5. Reinstall Photoshop 

If the above steps fail, a fresh installation may be necessary. Use the Adobe Creative Cloud Desktop app to uninstall Photoshop, ensuring you choose the option to remove preferences before reinstalling the latest version. 

I am running a Dell ProMax Intel Core Ultra 9, 64GB ram with a Nvidia rtx-4000 ada generation card.
When I load an image and then press remove background it causes a complete computer crash and reboot.
My minidump analysis in WinDbg gave the following. Please help me resolve this issue.
Thank youm
Laurence
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PROCESS_NAME:  Photoshop.exeERROR_CODE: (NTSTATUS) 0xc0000409 - The system detected an overrun of a stack-based buffer in this application. This overrun could potentially allow a malicious user to gain control of this application.EXCEPTION_CODE_STR:  c0000409EXCEPTION_PARAMETER1:  0000000000000003EXCEPTION_STR:  0xc0000409STACK_TEXT:  fffffd81`7e676118 fffff801`7e6bece9     : 00000000`00000139 00000000`00000003 fffffd81`7e676440 fffffd81`7e676398 : nt!KeBugCheckExfffffd81`7e676120 fffff801`7e6bf2f2     : ffffae81`e79eb000 fffff801`1832ccbe ffffae81`f1fdc000 00000000`00000000 : nt!KiBugCheckDispatch+0x69fffffd81`7e676260 fffff801`7e6bcf28     : fffff801`19bdb991 fffff801`19bdd9b5 fffff801`19b69225 00000000`00000001 : nt!KiFastFailDispatch+0xb2fffffd81`7e676440 fffff801`18f650d4     : ffffae82`2c89e000 00000000`00000002 ffff7664`b612e5e7 00000000`00000000 : nt!KiRaiseSecurityCheckFailure+0x368fffffd81`7e6765d0 ffffae82`2c89e000     : 00000000`00000002 ffff7664`b612e5e7 00000000`00000000 00000000`00000000 : nvlddmkm+0xd450d4fffffd81`7e6765d8 00000000`00000002     : ffff7664`b612e5e7 00000000`00000000 00000000`00000000 ffffae82`2bf5c060 : 0xffffae82`2c89e000fffffd81`7e6765e0 ffff7664`b612e5e7     : 00000000`00000000 00000000`00000000 ffffae82`2bf5c060 ffff7664`b612e500 : 0x2fffffd81`7e6765e8 00000000`00000000     : 00000000`00000000 ffffae82`2bf5c060 ffff7664`b612e500 ffff7664`b612e587 : 0xffff7664`b612e5e7SYMBOL_NAME:  nvlddmkm+d450d4MODULE_NAME: nvlddmkmIMAGE_NAME:  nvlddmkm.sysSTACK_COMMAND: .process /r /p 0xffffae822bb2d080; .thread /r /p 0xffffae82143e8080 ; kbBUCKET_ID_FUNC_OFFSET:  d450d4FAILURE_BUCKET_ID:  0x139_3_CORRUPT_LIST_ENTRY_nvlddmkm!unknown_functionOSPLATFORM_TYPE:  x64OSNAME:  Windows 10FAILURE_ID_HASH:  {313b10a2-72d5-e118-5040-eef20d8afced}Followup:     MachineOwner---------

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