Sample batch to run itself elevated

get-admin.bat

@echo off

echo Checking for permissions
>nul 2>&1 "%SYSTEMROOT%\system32\cacls.exe" "%SYSTEMROOT%\system32\config\system"

echo Permission check result: %errorlevel%

REM --> If error flag set, we do not have admin.
if '%errorlevel%' NEQ '0' (
echo Requesting administrative privileges...
goto UACPrompt
) else ( goto gotAdmin )

:UACPrompt
echo Set UAC = CreateObject^("Shell.Application"^) > "%temp%\getadmin.vbs"
echo UAC.ShellExecute "%~s0", "", "", "runas", 1 >> "%temp%\getadmin.vbs"

echo Running created temporary "%temp%\getadmin.vbs"
timeout /T 5
"%temp%\getadmin.vbs"
exit /B

:gotAdmin
if exist "%temp%\getadmin.vbs" ( del "%temp%\getadmin.vbs" )
pushd "%CD%"
CD /D "%~dp0" 

echo Batch was successfully started with admin privileges
echo .
cmd

@MiggieNRG Maybe try turning the User Account Control notifications off, and see if it'll make a difference (just for debugging purposes, since I don't see why it wouldn't work otherwise.) I use the script every time I feel too lazy to right-click a file, and click "Run as administrator", and so far, it has never failed me. Hope this helps, Miguel.

General debugging tips:
Remove "echo off"
Add pause command in some places
Run and see the output

Another variant would be:

@echo off

echo Checking for permissions
>nul 2>&1 "%SYSTEMROOT%\system32\cacls.exe" "%SYSTEMROOT%\system32\config\system"

echo Permission check result: %errorlevel%

REM --> If error flag set, we do not have admin.
if '%errorlevel%' NEQ '0' (
echo Requesting administrative privileges...
goto UACPrompt
) else ( goto gotAdmin )

:UACPrompt
if exist "%SYSTEMROOT%\System32\Cscript.exe" ( goto VBS )
goto PS

:VBS
echo Set UAC = CreateObject^("Shell.Application"^) > "%temp%\getadmin.vbs"
echo UAC.ShellExecute "%~s0", "", "", "runas", 1 >> "%temp%\getadmin.vbs"

echo Running created temporary "%temp%\getadmin.vbs"
timeout /T 5
"%temp%\getadmin.vbs"
exit /B

:PS
REM timeout /T 5
powershell -Command "Start-Process -Verb RunAs -FilePath '%0' -ArgumentList 'am_admin'"
exit /b

:gotAdmin
if exist "%temp%\getadmin.vbs" ( del "%temp%\getadmin.vbs" )
pushd "%CD%"
CD /D "%~dp0"

echo Batch was successfully started with admin privileges
echo .
cmd

This primarily uses the execution in vbs. If removed from newer Windows versions, execution in powershell is used

---

It becomes more modern with the following code

@echo off

>nul 2>&1 fsutil dirty query %systemdrive% && (goto gotAdmin) || (goto UACPrompt)
:UACPrompt
if exist "%SYSTEMROOT%\System32\Cscript.exe" (
    echo Set UAC = CreateObject^("Shell.Application"^) : UAC.ShellExecute "%~s0", "", "", "runas", 1 > "%temp%\getadmin.vbs" 
    "%temp%\getadmin.vbs"
    exit /b
) else (
    powershell -Command "Start-Process -Verb RunAs -FilePath '%0' -ArgumentList 'am_admin'"
    exit /b
)
:gotAdmin
if exist "%temp%\getadmin.vbs" del "%temp%\getadmin.vbs"
pushd "%CD%" && CD /D "%~dp0"
cls
cmd