I tried anything & everything - I do not have any “crazy white funky” AV or any of the programs mentioned previously in this thread (Sophos, Citrix, etc.,)
However, I let me PC cool off and rebooted and viola! All of a sudden my game is now launching and am able to play again. 
i don’t have an antivirus installed, do i need to install one and do the an exception in order for this to work ?
the only way where worked for me was
Unistall Webex
Unistall Comodo Antivirus !!!
I uninstall Citrix, I updated my Nvidia driver, I deleted all the files under 2 mb in the Data folder along with all the other folders besides Data, I ran ModernWarfare.exe as an administrator, I put a virus exception in Sophos. I ran the scan and repair so many times. Thanks to all the people that have suggested all these fixes. Nothing has worked!!!
Where the hell is Blizzard with an official reply or a patch to fix this. This is ridiculous.
Guys I have finally figured it out! After almost breaking my whole system and ripping out all of my hair trying absolutely everything I can think of… I FINALLY FIGURED IT OUT!!
Update your BIOS… Literally something so simple caused all this anger and frustration. Hopefully this helps all you out. Enjoy.
I checked Windows event log. It seems there is an issue with the ntdll.dll library. All software and drivers are up to date, game reinstalled from scratch. No luck so far. This is really frustrating!
Glad that you made it,
but i tried and this is still not the fix for me.
Anyway, i have an updated bios now, which is nice.
after reading windows event viewer it seems it is a ntdll.dll issue. i also face issue since last update. reinstall warzone from scratch doesn’t resolve it …
Is activision working on this issue ?
the lack of solve here is shameless for raven
Same here… Updated when I got home from visiting family… Tried to open the game and it just refused to open… No error message or anything. Been a few days now and I’m super frustrated…
Deleted Warzone, and sold my account lol
Is there any resolution to this? Blizzard hasn’t said a thing about it. How can a game this popular have this issue go on for so long. Is there a patch coming out to fix this? I am glad I did not buy the game yet, I was waiting to see if I liked Warzone.
Well I just freed up space in my HDD my uninstalling the game and gained 85GB now can install other games and enjoy them…
Nice you replied… You know, I can wrtite here that “I travelled to the future in order to delete the whole System32 Folder, then came back to the present, reboted and now the game works like a charm”, thing.
Could play the game without issues until version 1.36.3.9040825
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I ran first a sfc /scannow
It found no issues and after a restart it found Windows Updates which I installed. However, the game was still not working.
I uninstalled the AMD Drivers and updated to latest AMD drivers. Did not work.
Currently running 21.4.1 on RX 5700 XT
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Heres what I tried to do:
-Reinstalled Battle.net
-Reinstalled Call of duty
-Scan and repair Call of duty:Warzone
-Updated GPU drivers
-Updated chipset drivers
-checked firewall
My pc:
Windows 10 Pro / 64 bit * latest updates *
AMD Graphics 8gb * latest drivers *
Nothing works!
Found the following in Windows Problem Report
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Source
Call of Duty®: Modern Warfare®
Summary
Stopped working
Date
03/05/2021 21:09
Status
Report sent
Description
Faulting Application Path: D:\Games\Call of Duty Modern Warfare\ModernWarfare.exe
Problem signature
Problem Event Name: APPCRASH
Application Name: ModernWarfare.exe
Application Version: 1.0.0.0
Application Timestamp: 6089b767
Fault Module Name: ntdll.dll
Fault Module Version: 10.0.19041.964
Fault Module Timestamp: bd2c3c23
Exception Code: c0000005
Exception Offset: 000000000002a9c0
OS Version: 10.0.19042.2.0.0.256.48
Locale ID: 3072
Additional Information 1: b5bf
Additional Information 2: b5bf6e911751df6e1561c25854554adc
Additional Information 3: d703
Additional Information 4: d703067a099aa7dac81ee8c1611ab859
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Hi all,
I just went to Activision’s website and reported the bug I would encourage you all to do so to so this gets fixed faster. SupportActivisionCom/options Select the game and platform and submit your ticket. Add dots between the capital letters since we cannot put links in here for some reason, This is what I said to them:
*I cannot start the game. This has been ongoing since 04/22. You hit play in the Blizzard Battlenet game launcher and it says Launching. Then it goes back to Play and the game hangs.
I am at the same stage as you… contacted Activision support, they suggesting deliting cache, did that and the issue persist. Raised a ticket and explained the issue, hopefully a fix soon
Jesus Christ., it’s been two weeks and still no progress.
I had to install COD MW3, so I could at least play something.
I rarely play warzone, mostly in multiplayer - I don’t understand what I paid money for?
Faulting application name: ModernWarfare.exe, version: 1.0.0.0, time stamp: 0x6089b767
Faulting module name: ModernWarfare.exe, version: 1.0.0.0, time stamp: 0x6089b767
Exception code: 0xc0000005
Fault offset: 0x000000001d16f252
Faulting process id: 0x1020
Faulting application start time: 0x01d740299062cc59
Faulting application path: D:\Call of Duty Modern Warfare\ModernWarfare.exe
Faulting module path: D:\Call of Duty Modern Warfare\ModernWarfare.exe
Report Id: da968668-ac1c-11eb-b7a1-08626648b163
Same here… I thought it will be a quick fix… Seems like no one gives a s**t about us 