Here is the batch file which should work for you:
@echo off
Title HOST: Installing updates on %computername%
echo %computername%
set Server=\\SERVERNAME or PATH\msifolder
:select
cls
echo Select one of the following MSI install folders for installation task.
echo.
dir "%Server%" /AD /ON /B
echo.
set /P "MSI=Please enter the MSI folder to install: "
set "Package=%Server%\%MSI%\%MSI%.msi"
if not exist "%Package%" (
echo.
echo The entered folder/MSI file does not exist ^(typing mistake^).
echo.
setlocal EnableDelayedExpansion
set /P "Retry=Try again [Y/N]: "
if /I "!Retry!"=="Y" endlocal & goto select
endlocal
goto :EOF
)
echo.
echo Selected installation: %MSI%
echo.
echo.
:verify
echo Is This Correct?
echo.
echo.
echo 0: ABORT INSTALL
echo 1: YES
echo 2: NO, RE-SELECT
echo.
set /p "choice=Select YES, NO or ABORT? [0,1,2]: "
if [%choice%]==[0] goto :EOF
if [%choice%]==[1] goto yes
goto select
:yes
echo.
echo Running %MSI% installation ...
start "Install MSI" /wait "%SystemRoot%\system32\msiexec.exe" /i /quiet "%Package%"
The characters listed on last page output on entering in a command prompt window either help cmd or cmd /? have special meanings in batch files. Here are used parentheses and square brackets also in strings where those characters should be interpreted literally. Therefore it is necessary to either enclose the string in double quotes or escape those characters with character ^ as it can be seen in code above, otherwise command line interpreter exits batch execution because of a syntax error.
And it is not possible to call a file with extension MSI. A *.msi file is not an executable. On double clicking on a MSI file, Windows looks in registry which application is associated with this file extension for opening action. And the application to use is msiexec with the command line option /i to install the application inside MSI package.
Run msiexec.exe /? to get in a GUI window the available options or look at Msiexec (command-line options).
I have added already /quiet additionally to required option /i for a silent installation.
In batch code above command start is used with option /wait to start Windows application msiexec.exe and hold execution of batch file until installation finished (or aborted).