Solved How to check existence of a registry key before running a command


Sheikh

Sheikh

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Hi again.

How can I check if there is a reg key before running a command?
for example, I want to run this command:
Batch: 
REG Add "HKLM\SYSTEM\CurrentControlSet\Control\CrashControl" /V "CrashDumpEnabled" /T "REG_DWORD" /D "0" /F
but before running it, I want to make sure that this registry key exists. how can I add "if" to this command?
I have many "reg" commands in my script after each other.

another command is:
Batch: 
SC Config "AJRouter" Start=Disabled
How can I make sure this service is available and then run this command?
have many "sc" commands in my script too.

Thanks.
 

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I found a solution for that ... if it's wrong please tell me. thanks.
Batch: 
REG Query "HKLM\SYSTEM\CurrentControlSet\Control\CrashControl" /V "CrashDumpEnabled"
if %ERRORLEVEL% EQU 0 (
REG Add "HKLM\SYSTEM\CurrentControlSet\Control\CrashControl" /V "CrashDumpEnabled" /T "REG_DWORD" /D "0" /F
)
REG Query "HKLM\SYSTEM\CurrentControlSet\Control\FileSystem" /V "NtfsDisableLastAccessUpdate"
if %ERRORLEVEL% EQU 0 (
REG Add "HKLM\SYSTEM\CurrentControlSet\Control\FileSystem" /V "NtfsDisableLastAccessUpdate" /T "REG_DWORD" /D "80000001" /F
)
REG Query "HKLM\SOFTWARE\Policies\Microsoft\Windows\Windows Search" /V "DisableechoovableDriveIndexing"
if %ERRORLEVEL% EQU 0 (
REG Add "HKLM\SOFTWARE\Policies\Microsoft\Windows\Windows Search" /V "DisableechoovableDriveIndexing" /T "REG_DWORD" /D "1" /F
)
REG Query "HKLM\SOFTWARE\Policies\Microsoft\Windows\Windows Search" /V "PreventUsingAdvancedIndexingOptions"
if %ERRORLEVEL% EQU 0 (
REG Add "HKLM\SOFTWARE\Policies\Microsoft\Windows\Windows Search" /V "PreventUsingAdvancedIndexingOptions" /T "REG_DWORD" /D "1" /F
)
 

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You globally replaced of "rem" with "echo".

"DisableechoovableDriveIndexing"
 

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You had another reg file where I saw "echoote".
 

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garlin said:
You had another reg file where I saw "echoote".
Click to expand...
that was the only reason I got too many errors these days and I couldn't see it...
you saved me! thank you:tears:
 

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Sheikh said:
another command is:
SC Config "AJRouter" Start=DisabledHow can I make sure this service is available and then run this command?
have many "sc" commands in my script too.
Click to expand...
any idea?
 

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    Windows 11 Pro 25H2Ryzen 5 3500U8GBVega 8
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    Huawei MateBook D15
    CPU
    Ryzen 5 3500U
    Memory
    8GB
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    Vega 8
    Screen Resolution
    FHD
    Hard Drives
    256GB Samsung SSD + 1TB HDD
    Browser
    Microsoft Edge
    Antivirus
    ESET Smart Security Premium

  • At a glance

    Windows 10 Enterprise LTSC 21H2intel core i7 6700HQ16GBNvidia Geforce GTX1060 (6GB)
    Operating System
    Windows 10 Enterprise LTSC 21H2
    Computer type
    Laptop
    Manufacturer/Model
    MSI GS73 6RF Stealth Pro
    CPU
    intel core i7 6700HQ
    Memory
    16GB
    Graphics card(s)
    Nvidia Geforce GTX1060 (6GB)
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    FHD
    Hard Drives
    128GB SSD + 1TB HDD
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Sheikh said:
any idea?
Click to expand...

All this is easier to do in powershell

Screenshot 2025-07-17 172040.webp
Screenshot 2025-07-17 172441.webp
You can suppress output and just look at the return status with $?

Code: 
PS E:\Gene\Desktop> $s = Get-Item -Path Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\junk 2> null
PS E:\Gene\Desktop> $?
False
PS E:\Gene\Desktop>
 
Last edited:

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garlin said:
You had another reg file where I saw "echoote".
Click to expand...
github.com

Windows-Optimizer/WindowsOptimizer.bat at main · Sheikh98-DEV/Windows-Optimizer

This script optimizes Windows settings, debloats, cleans and modifies registries. - Sheikh98-DEV/Windows-Optimizer
github.com github.com
I think it's alright now.
I will change those "sc config" commands to "sc query "***"| find "RUNNING" >nul 2>&1 && net stop "***" && sc config "***" start= disabled" in version 6 beta.

thank you all my friends.
 

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    Windows 11 Pro 25H2Ryzen 5 3500U8GBVega 8
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    Laptop
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    Huawei MateBook D15
    CPU
    Ryzen 5 3500U
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    Vega 8
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    256GB Samsung SSD + 1TB HDD
    Browser
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    ESET Smart Security Premium

  • At a glance

    Windows 10 Enterprise LTSC 21H2intel core i7 6700HQ16GBNvidia Geforce GTX1060 (6GB)
    Operating System
    Windows 10 Enterprise LTSC 21H2
    Computer type
    Laptop
    Manufacturer/Model
    MSI GS73 6RF Stealth Pro
    CPU
    intel core i7 6700HQ
    Memory
    16GB
    Graphics card(s)
    Nvidia Geforce GTX1060 (6GB)
    Screen Resolution
    FHD
    Hard Drives
    128GB SSD + 1TB HDD
    Browser
    Microsoft Edge
    Antivirus
    Windows Defender
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