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

Sheikh · 2025-07-17T13:35:35-0400

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.

Sheikh · 2025-07-17T13:56:57-0400

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
)

garlin · 2025-07-17T14:02:52-0400

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

"DisableechoovableDriveIndexing"

Sheikh · 2025-07-17T14:04:18-0400

garlin said:
You globally replaced of "rem" with "echo".

"DisableechoovableDriveIndexing"

OOOW MY GODDDDDDDD

garlin · 2025-07-17T14:08:31-0400

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

Sheikh · 2025-07-17T14:14:25-0400

garlin said:
You had another reg file where I saw "echoote".

that was the only reason I got too many errors these days and I couldn't see it...
you saved me! thank you :tears:

Sheikh · 2025-07-17T14:19:00-0400

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.

any idea?

garlin · 2025-07-17T15:30:48-0400

AI can probably tackle this task. Or borrow from GitHub.

windows-10-cleanup/4-disable-windows-error-reporting-service.bat at master · mhanney/windows-10-cleanup

gunrunnerjohn · 2025-07-17T17:03:14-0400

Google shows a bunch of different ways to check for a registry key.

Google Search: script to check if registry key exists

PerpetualCycle · 2025-07-17T17:22:10-0400

Sheikh said:
any idea?

All this is easier to do in powershell

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>

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

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