Please help: BO7 crashes with 0xC0000005 on PC Game Pass and Steam even after clean Windows installs

I really need help with a persistent Call of Duty: Black Ops 7 crash on PC.

The game repeatedly crashes with:

0xC0000005

EXCEPTION_ACCESS_VIOLATION

Faulting module: cod.exe

PC:

Intel Core i7-14700

RTX 4070 12GB

32GB DDR5

ASUS PRIME B760M-AJ

This happens on both the PC Game Pass/Xbox version and the Steam version.

I have already tested the following:

• Clean-installed Windows 11
• Tested Windows 10 22H2 and Windows 11 25H2
• Tested another Windows user account
• Reinstalled Call of Duty
• Verify/Repair
• Deleted/rebuilt shader cache
• Deleted/recreated Documents\Call of Duty\players
• Clean Boot
• Tested without reWASD, GameSir Connect, WUB or dControl
• Physically disconnected the GameSir controller
• Disabled HAGS
• Disabled overlays/OSD software
• Disabled iGPU
• DDU + clean NVIDIA driver install
• Tested NVIDIA 616.92 and 591.59, plus current drivers
• Updated motherboard BIOS
• BIOS 9011 / Intel microcode 0x133
• Disabled XMP / tested DDR5-4800
• Disabled DRAM Power Down
• Replaced msvcp140.dll with the System32 version
• Tested a fixed pagefile of 8192/8193 MB
• Tested another Steam/Activision account

None of these fixed it.

Hardware checks:

• MemTest86: 4 passes, 0 errors
• Intel Processor Diagnostic Tool: PASS
• No WHEA-Logger hardware errors

On the Game Pass version I repeatedly reproduced:

C8D81B9E-D3ABC851-FA6F9127-94D1EC24

Steam also crashes with 0xC0000005.

I also analyzed a COD dump.dmp in WinDbg. At the crash, RCX = 0 and cod.exe attempts to read from that address (equivalent to mov eax,[rcx]), producing a NULL/invalid pointer read.

Before reinstalling Windows, the game often crashed during shader preload around 3-3.5%. After the clean install, shader preload can finish, but the game still crashes afterward.

Activision Support has already escalated my case, but I still do not have a cause or solution.

Because this also happens on the PC Game Pass/Xbox version, I would like to know if there is anything on the Windows/Xbox/Gaming Services side that could cause this kind of access violation.

Is there any deeper diagnostic I can run for Xbox App, Gaming Services, Microsoft Store licensing/services, DirectX, memory management, or Windows crash handling?

I am especially looking for help beyond the usual reinstall/update/clean boot steps, because those have already been completed multiple times.

If useful, I can provide COD crash reports including dump.dmp, info.json, stacktrace_crash.csv, dxdiag_oncrash.txt and bootlog.txt.

Any help identifying the next meaningful test would be greatly appreciated.