whenever I boot my PC, i get THIS error (instead of login screen)

Startup/Login issue: whenever I boot my PC, instead of showing the login screen, it shows THIS error: (image link: (zoom in if you can't see it): 100_0164.JPG - Google Drive )
This happened when I used msconfig.exe (system configuration) and autoruns (from Windows Sysinternals: Autoruns for Windows - Windows Sysinternals | Microsoft Docs ) to disable every windows service except for:

windows audio endpoint builder
windows audio
base filtering engine
avctp service
capability access manager service
cryptographics services
device association service
DHCP client
connected user experiences and telemetry
display policy service
display enhancement srvce
dns client
group policy client
human interface device settings
IPhelper
CNG key isolation
SERVER
WORKSTATION
TCP/ip netbios helper
local session manager
network connection brooker
network list service
network location awareness
network store interface service
program compatibility system service
plug and play
power
remote access connections manager
radio management service
RPC endpoint mapper
realtek audio service
task scheduler
system guard runtime monitor
shell hardware detection
print spooler
secure socket tunneling protocol service
state repository service
synTPEnh caller service
system events broker
themes
time broker
credential manager
windows connection manager
winHTTP web proxy auto-discovery service
windows management instrumentation
WLAN autoconfig
connected device platform user service_(insert random group of characters here)
sync host_(insert random group of characters here)

I tried to use msconfig.exe as much as possible to disable the services, but whenever msconfig.exe wouldn’t let me disable a windows service, i used autoruns (which edits the registry).

The services disabled using autoruns were:

APPX DEPLOYMENT SERVICE
BACKGROUND TASKS INFRASTRUCTURE SERVICE
CLIENT LICENSE SERVICE
CORE MESSAGING
DELIVERY OPTIMISATION
WINDOWS DEFENDER FIREWALL
WINDOWS INSTALLER
WINDOWS SECURITY SERVICE
WINDOWS UPDATE MEDIC SERVICE
MICROSOFT DEFENDER ANTIVIRUS NETWORK INSPECTION SERVICE
MICROSOFT DEFENDER ANTIVIRUS SERVICE
SECURITY CENTER
CLIPBOARD USER SERVICE_(INSERT RANDOM GROUP OF CHARACTERS HERE)
WINDOWS PUSH NOTIFICATIONS USER SERVICE_(insert random group of characters here)

When autoruns said “access denied” when i tried to disable “secure” services like MICROSOFT DEFENDER ANTIVIRUS SERVICE, i ran autoruns using NSudoLG.exe (GUI version)
(github: Release NSudo 8.2 . M2Team/NSudo . GitHub ) to run autoruns with trustedinstaller privileges.

I restarted my PC after applying the changes, and the error above appeared,

I am not asking how to solve this issue, I already know how to. (by reinstalling windows)

I am asking “WHY DID THIS HAPPEN”?

The answer I want is along the lines of “(insert service here) service manages the login screen. Disabling it will give you this error.”

I am running:
Edition: Windows 10 Home
Version: 20H2
Installed on: ‎3/‎1/‎2021
OS build: 19042.631
Experience: Windows Feature Experience Pack 120.2212.31.0

PC specs:
CPU: AMD A4-5000 APU with Radeon(™) HD graphics @ 1.5 GHz
GPU: AMD Radeon HD 8330 @ 500 MHz (512mb VRAM)
RAM: 4gb DDR3 (brand: unknown) @ 800MHz (3.5gb usable)
SSD: Samsung SSD 840 EVO 120GB

LAPTOP MODEL: HP Touchsmart 15 Notebook PC (HP TouchSmart 15-d020nr)

Please note that telling me to “re-enable all services” will waste my time. I am trying to run davinci resolve on my laptop. Davinci Resolve is VERY resource heavy. Windows background processes that aren't needed need to be disabled. If they are not disbaled, windows will take up 2GB of RAM idle. Since I only have 4gb of RAM total, only 2gb of RAM will be available. Davinci Resolve takes up 2gb Ram idle. Resolve will crash from lack of RAM because 2+2=4. Since my integrated graphics take up 512mb RAM, my total amount of ram available is only 3.5gb. When I try to run windows (no disabled services) and davinci resolve at the same time, i am trying to run 4gb RAM worth of processes when i only have 3.5gb RAM available. This causes crashing.
I know the amount of RAM used by system services is unnecessary because windows 10 LTSC can run at 0.5gb RAM idle (NOT 2GB) because it has less services running in the background. If i had windows 10 LTSC, the crashing wouldn't be an issue. I am trying to make windows 10 home as lightweight as windows 10 LTSC so I can run davinci resolve without crashing. To do that I need to disable most of the services.
I will not upgrade the RAM on my laptop OR buy a new pc because I don't have the money for that.
Thank you. :)

Q:If I hit myself in the head with a hammer it hurts. What should I do?

A: Don't hit yourself in the head with a hammer.

Okay, poor attempt at humor, I know. But the point is that if you disabled a bunch of services and you right after that you get an error it's almost guaranteed that this is the source of the problem.

I know that you don't want to hear that you need to re-enable everything, but how about re-enabling a few items at a time until you narrow down what group of items causes the problem?

At that point you have the issue isolated to just a few items. Now, disable one at a time until you encounter the issue again.

Also, I'm going be straight forward with you here so that we are not setting false expectations:

Frankly, you are going about resolving this issue the wrong way. The MINIMUM recommended system requirements for Davinci Resolve are 16GB RAM for HD Video, 32GB for 4K video. Running at 1/4 of the recommended minimum and then trying to disable core Windows services is not what I personally would call any kind of reasonable solution.

My apologies - I know that this may not be what you want to hear but I think a dose of reality is called for in this instance.

"I am asking “WHY DID THIS HAPPEN”?"
--- Looks to me because decisions were made w/o absolutely knowing if those decisions were the right ones to make.

"Please note that telling me to “re-enable all services” will waste my time."
---"I am not asking how to solve this issue, I already know how to. (by reinstalling windows)"

"I will not upgrade the RAM"
--- Your decision but it appears to me that is a necessity.

On the "SSD: Samsung SSD 840 EVO 120GB", is that enough volume to manage your apps etc?

"Davinci Resolve is VERY resource heavy"
--- After re-installing windows, ask about how you can manage that.

Consider creating system image backups at appropriate times: the first one after reinstalling windows but before addressing "Davinci Resolve is VERY resource heavy"

One more thought: If you are at a point where you cannot logon to Windows, try to roll back to the latest recovery point on your system. Another thing to try is going into safe mode (if it will let you) and then see if you can reset services to their previous state, then go back and try disabling only a few items at a time so that you know within just a few items when you encounter the issue again.

@hsehestedt "I know that you don't want to hear that you need to re-enable everything, but how about re-enabling a few items at a time until you narrow down what group of items causes the problem? "
"At that point you have the issue isolated to just a few items. Now, disable one at a time until you encounter the issue again."

thanks, i will try that

"Frankly, you are going about resolving this issue the wrong way. The MINIMUM recommended system requirements for Davinci Resolve are 16GB RAM for HD Video, 32GB for 4K video. "

my video files are recorded in 720p24 (bitrate: 10,000 kbps). using proxy files generated with handbrake i can turn that down to 144p24 (256 by 144 pixels. bitrate: 500 kbps) . then it runs perfectly with no issues. after all the edits, i can turn the resolution back to 720p and export. by doing this, my CPU and GPU can handle everything. the only issue is RAM. i need at least 250mb more RAM so i dont crash when i do things like swiching from edit page to color grading page, and back to edit page quickly, over and over. that ram is used by windows services that i dont need.
@MeAndMyComputer
"On the "SSD: Samsung SSD 840 EVO 120GB", is that enough volume to manage your apps etc?"
yes beacuse i removed EVERYTHING that i dont need, auto update is disabled on almost everything, and after i finish a project i delete all the origional footage leaving only the final rendered project. anything else that takes up a LOT of storage is on cloud storage.

@hsehestedt "One more thought: If you are at a point where you cannot logon to Windows, try to roll back to the latest recovery point on your system. Another thing to try is going into safe mode (if it will let you) and then see if you can reset services to their previous state, then go back and try disabling only a few items at a time so that you know within just a few items when you encounter the issue again."

ive never done a system backup before but i might consider it. how much storage does it take up?

loging into my pc isnt an issue because I dual booted windows 10 (install one) with windows 10 (install two). i only disabled services on install one, so install two is prefectly normal with no issues. also on the "select an operating system" menu, there is recovery options such as "reinstall windows 10" and "boot in safe mode". i can troubleshoot using this.
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thanks everyone, i will try narrowing down the issue.

ProMOAT said:

ive never done a system backup before but i might consider it. how much storage does it take up?

I'm actually not even talking about a full system backup at that point in my post. I was referring to the automatically created recovery points that System Restore creates.

These are created automatically by Windows at certain time intervals or when you perform certain operations on Windows such as installing applications or drivers. I'm not sure if these are performed when you disable services (probably not) but the point is to try to find a point before those were disabled to see if that helps the situation. It may not, but I think it would certainly be worth a shot.

See this tutorial for details:

System Restore Windows 10 | Tutorials (tenforums.com)