Contact Dell GHN (Get Help Now) chat technical support Monday through Friday. Click the blue "Get Help Now" on the right to start a private live chat session. Share the private Service Tag with them so that they can verify the ownership and warranty status. This will also generate a unique Technical Support case for your unique Service Tag. If already out of warranty, click here for the Dell out of warranty offering.
This is my notebook, there isn't virus od malware!, only Dell apps and Windows apps! Blocking the entire RAM memory takes several days, for example a weekend, I find Whatsapp as first problem, but I don't kill Windows or Dell apps from startup:
@anne_droid I find MS sandbox, I used it, but now uninstall it. Unfortunately this morning the laptop was dead again, was it very hot. Malwarebytes nothitng find, if I killed dell some apps (dell tech hub and supportassist) on supportassist crash again on critical_proccess_died (0xef) ... dell supportassist is critical process? :_( I now uninstall: copilot, MS 365 copilot, all dell apps: Dell conected service delivery, dell service core (with tech hub), dell pair, 3x dell supportassist. I only left dell supportassist os recovery plugin. I'll see tomorrow if it helped.
CRITICAL_PROCESS_DIED with bugcheck 0xEF means Windows has detected that a core system process (e.g. csrss.exe, wininit.exe, winlogon.exe, services.exe) has crashed or become corrupted, so it forces a bugcheck/BSOD to protect the OS.
What the 0xEF stop code means
Officially: bug check 0x000000EF = CRITICAL_PROCESS_DIED, “a critical system process died”.
Typical critical processes involved include csrss.exe, wininit.exe, winlogon.exe, smss.exe, services.exe, conhost.exe, and logonui.exe.
When one of these terminates unexpectedly (code corruption, memory corruption, I/O errors, bad driver), Windows cannot safely continue and throws the blue screen.
Common causes (including Dell‑specific angles)
On any Windows 10/11 machine (including Dell), frequent triggers are:
Bad or incompatible device drivers (often after a driver or Windows update).
Corrupted system files or OS image (e.g. bad shutdown, power loss, failing disk).
Problematic Windows updates / hotfixes; Dell documents 0xEF occurring after certain Windows hotfixes on some Alienware / G‑Series systems.
Hardware problems: RAM errors, SSD/HDD problems, overheating, unstable power or battery issues.
Malware or low‑level software (AV, disk encryption, overclocking tools) tampering with system processes.
On Dell laptops specifically, one Dell forum reply notes repeated CRITICAL_PROCESS_DIED crashes on battery traced to a dying or non‑genuine battery causing unstable power; swapping to a good Dell battery stopped the error.
First checks to make on a Dell
Assuming it boots sometimes:
Think “what changed just before it started”
New driver, BIOS/firmware change, Windows Update, new software or game. These are prime suspects for 0xEF.
Run system file and image repair (from an elevated CMD or PowerShell)
DISM /Online /Cleanup-Image /RestoreHealth then
sfc /scannow (may need 2–3 runs until it reports no integrity violations).
If Windows will not boot, run these from WinRE (Advanced options → Command Prompt).
Check disk health
chkdsk C: /f /r to look for bad sectors and file system errors.
On Dell SSD/HDD, it is also worth running Dell’s diagnostics (F12 at boot → Diagnostics) to check storage and RAM, since hardware faults are a known BSOD cause.
Driver and update rollback
In Device Manager, roll back or reinstall any recently updated driver, especially storage, chipset, GPU and network drivers.
Uninstall the last Windows update/hotfix if the problem began right after a patch; Dell explicitly notes certain hotfixes as triggers for CRITICAL_PROCESS_DIED on some models.
Clean boot / Safe Mode
Perform a clean boot (disable all non‑Microsoft services & startup entries) to see if third‑party software is at fault.
If BSODs disappear in a clean boot, re‑enable items in batches to identify the offender.
When it will not boot at all
On a Dell stuck in a BSOD loop with 0xEF:
Use three hard power‑offs during boot to force WinRE, then go to Troubleshoot → Advanced options.
Try in order:
Startup Repair.
System Restore to a point before the issue.
From Command Prompt: chkdsk, DISM, sfc as above.
If those fail and disk/RAM diagnostics pass, consider an in‑place repair install or clean reinstall of Windows using Microsoft’s Media Creation Tool.
Dell‑specific things to keep in mind
Run full Dell ePSA diagnostics (F12 → Diagnostics) for RAM, disk, CPU and battery, as unstable components can kill critical processes and trigger 0xEF.
If the issue only appears on battery or under load, suspect battery or power delivery; one Dell XPS owner resolved recurring CRITICAL_PROCESS_DIED by replacing a failing battery with a proper Dell unit.
Also check for any Dell BIOS updates that explicitly mention stability/BSOD fixes, but only flash BIOS when the system is stable and on reliable power.
@anne_droid CRITICAL_PROCESS_DIED occurred immediately after I killed dell assistant. Today morning notebook was black screen without text, all hot again and fans at full power.. sfc /scannow - some repair, which is no wonder, after so many falls.
F12 after start - quick and all extended test passed without errors... Without dell applications the memory doesn't fill up as much - it helped for work.
I'm running out of ideas. Windows 11pro only 24H2 (2025 has block on domain), domain, without Entra, apps ESET endpoint antivirus, TeamViewer full version, without superfetch - block on domain, Intel drivers for graphics, all update, but it crashes more and more.
in friday after work, if I closed all work apps and lock notebook, after 10min falled again :( if I didn't log in on Friday after restart, notebook was live until monday, but today morning is dead again, without text on screen... in friday I test 1TB SSD - chkdsk C: /f /r (cca 3 hours long 1-4steps), test HW after F12, but I didn't find any hw problem.
Pretty much the last desperate throw of the dice....
Sometimes there is the option to allow USB ports to remain active after shut down.
On most systems you can reduce or stop this drain by:
Disabling any BIOS/UEFI options like:
“USB charging in off state,” “USB power in S5,” “Power off USB charging,” or similar.
“Resume/Wake by USB device.”
Enabling “ErP” / “Energy-related Products mode,” which often cuts USB power when off.
In Windows, turning off Fast Startup and Hibernate can also affect how power is handled after shutdown.
If you still see LEDs on USB devices after shutdown, unplug the charger from the laptop; if the lights go out, the ports were being powered from mains, not the battery.
@anne_droid According to Dell support, the laptop is overheating and has started to destroy the 1TB m.2 SSD. They will replace the motherboard and SSD.
DELL-Jesse L
Moderator
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17.9K Posts
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February 24th, 2026 07:26
Contact Dell GHN (Get Help Now) chat technical support Monday through Friday. Click the blue "Get Help Now" on the right to start a private live chat session. Share the private Service Tag with them so that they can verify the ownership and warranty status. This will also generate a unique Technical Support case for your unique Service Tag. If already out of warranty, click here for the Dell out of warranty offering.
user_59406a
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8 Posts
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February 24th, 2026 08:03
Edit: Fix your unusable applications, fix the dell windows system so that it doesn't eat up all the resources (clean Windows doesn't do that!).
anne_droid
3 Apprentice
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1.3K Posts
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February 24th, 2026 11:35
Hi
The obvious next step is to attempt to run a full hardware diagnostic.
After that find a way to log in using SAFE MODE.
Preferably create a use a single user, and not run as ADMIN.
Try a free version of MalwareBytes.
EXIT and SHUTDOWN (force a shutdown) to eliminate background apps flattening the battery.
user_59406a
1 Rookie
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8 Posts
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February 24th, 2026 12:23
This is my notebook, there isn't virus od malware!, only Dell apps and Windows apps! Blocking the entire RAM memory takes several days, for example a weekend, I find Whatsapp as first problem, but I don't kill Windows or Dell apps from startup:
First 10 apps are from Windows and Dell!
(edited)
anne_droid
3 Apprentice
•
1.3K Posts
0
February 25th, 2026 10:33
Hi
Well I would look at the registry and check the "RUN ONCE" and "RUN" keys to see if anything can be changed.
AND https://learn.microsoft.com/en-us/sysinternals/ run sysinternals to clean up the running programs.
EG: Do you always need the print spooler running?
I wish you luck.
BYE.
user_59406a
1 Rookie
•
8 Posts
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February 26th, 2026 08:45
@anne_droid I find MS sandbox, I used it, but now uninstall it. Unfortunately this morning the laptop was dead again, was it very hot. Malwarebytes nothitng find, if I killed dell some apps (dell tech hub and supportassist) on supportassist crash again on critical_proccess_died (0xef) ... dell supportassist is critical process? :_(
I now uninstall: copilot, MS 365 copilot, all dell apps:
Dell conected service delivery, dell service core (with tech hub), dell pair, 3x dell supportassist.
I only left dell supportassist os recovery plugin.
I'll see tomorrow if it helped.
(edited)
anne_droid
3 Apprentice
•
1.3K Posts
0
February 26th, 2026 10:36
CRITICAL_PROCESS_DIED with bugcheck 0xEF means Windows has detected that a core system process (e.g. csrss.exe, wininit.exe, winlogon.exe, services.exe) has crashed or become corrupted, so it forces a bugcheck/BSOD to protect the OS.
What the 0xEF stop code means
Officially: bug check 0x000000EF = CRITICAL_PROCESS_DIED, “a critical system process died”.
Typical critical processes involved include csrss.exe, wininit.exe, winlogon.exe, smss.exe, services.exe, conhost.exe, and logonui.exe.
When one of these terminates unexpectedly (code corruption, memory corruption, I/O errors, bad driver), Windows cannot safely continue and throws the blue screen.
Common causes (including Dell‑specific angles)
On any Windows 10/11 machine (including Dell), frequent triggers are:
Bad or incompatible device drivers (often after a driver or Windows update).
Corrupted system files or OS image (e.g. bad shutdown, power loss, failing disk).
Problematic Windows updates / hotfixes; Dell documents 0xEF occurring after certain Windows hotfixes on some Alienware / G‑Series systems.
Hardware problems: RAM errors, SSD/HDD problems, overheating, unstable power or battery issues.
Malware or low‑level software (AV, disk encryption, overclocking tools) tampering with system processes.
On Dell laptops specifically, one Dell forum reply notes repeated CRITICAL_PROCESS_DIED crashes on battery traced to a dying or non‑genuine battery causing unstable power; swapping to a good Dell battery stopped the error.
First checks to make on a Dell
Assuming it boots sometimes:
Think “what changed just before it started”
New driver, BIOS/firmware change, Windows Update, new software or game. These are prime suspects for 0xEF.
Run system file and image repair (from an elevated CMD or PowerShell)
DISM /Online /Cleanup-Image /RestoreHealththensfc /scannow(may need 2–3 runs until it reports no integrity violations).If Windows will not boot, run these from WinRE (Advanced options → Command Prompt).
Check disk health
chkdsk C: /f /rto look for bad sectors and file system errors.On Dell SSD/HDD, it is also worth running Dell’s diagnostics (F12 at boot → Diagnostics) to check storage and RAM, since hardware faults are a known BSOD cause.
Driver and update rollback
In Device Manager, roll back or reinstall any recently updated driver, especially storage, chipset, GPU and network drivers.
Uninstall the last Windows update/hotfix if the problem began right after a patch; Dell explicitly notes certain hotfixes as triggers for CRITICAL_PROCESS_DIED on some models.
Clean boot / Safe Mode
Perform a clean boot (disable all non‑Microsoft services & startup entries) to see if third‑party software is at fault.
If BSODs disappear in a clean boot, re‑enable items in batches to identify the offender.
When it will not boot at all
On a Dell stuck in a BSOD loop with 0xEF:
Use three hard power‑offs during boot to force WinRE, then go to Troubleshoot → Advanced options.
Try in order:
Startup Repair.
System Restore to a point before the issue.
From Command Prompt:
chkdsk,DISM,sfcas above.If those fail and disk/RAM diagnostics pass, consider an in‑place repair install or clean reinstall of Windows using Microsoft’s Media Creation Tool.
Dell‑specific things to keep in mind
Run full Dell ePSA diagnostics (F12 → Diagnostics) for RAM, disk, CPU and battery, as unstable components can kill critical processes and trigger 0xEF.
If the issue only appears on battery or under load, suspect battery or power delivery; one Dell XPS owner resolved recurring CRITICAL_PROCESS_DIED by replacing a failing battery with a proper Dell unit.
Also check for any Dell BIOS updates that explicitly mention stability/BSOD fixes, but only flash BIOS when the system is stable and on reliable power.
user_59406a
1 Rookie
•
8 Posts
0
February 27th, 2026 08:25
@anne_droid CRITICAL_PROCESS_DIED occurred immediately after I killed dell assistant.
Today morning notebook was black screen without text, all hot again and fans at full power..
sfc /scannow - some repair, which is no wonder, after so many falls.
F12 after start - quick and all extended test passed without errors...
Without dell applications the memory doesn't fill up as much - it helped for work.
I'm running out of ideas.
Windows 11pro only 24H2 (2025 has block on domain), domain, without Entra, apps ESET endpoint antivirus, TeamViewer full version, without superfetch - block on domain, Intel drivers for graphics, all update, but it crashes more and more.
user_59406a
1 Rookie
•
8 Posts
0
March 3rd, 2026 08:22
in friday after work, if I closed all work apps and lock notebook, after 10min falled again :( if I didn't log in on Friday after restart, notebook was live until monday, but today morning is dead again, without text on screen...
in friday I test 1TB SSD - chkdsk C: /f /r (cca 3 hours long 1-4steps), test HW after F12, but I didn't find any hw problem.
The laptop is behaving strangely.
anne_droid
3 Apprentice
•
1.3K Posts
0
March 3rd, 2026 12:50
Hi
Pretty much the last desperate throw of the dice....
Sometimes there is the option to allow USB ports to remain active after shut down.
On most systems you can reduce or stop this drain by:
Disabling any BIOS/UEFI options like:
“USB charging in off state,” “USB power in S5,” “Power off USB charging,” or similar.
“Resume/Wake by USB device.”
Enabling “ErP” / “Energy-related Products mode,” which often cuts USB power when off.
In Windows, turning off Fast Startup and Hibernate can also affect how power is handled after shutdown.
If you still see LEDs on USB devices after shutdown, unplug the charger from the laptop; if the lights go out, the ports were being powered from mains, not the battery.
(edited)
user_59406a
1 Rookie
•
8 Posts
1
March 4th, 2026 05:12
@anne_droid According to Dell support, the laptop is overheating and has started to destroy the 1TB m.2 SSD. They will replace the motherboard and SSD.