I don't understand exactly your aim to open and to close immediately Internet explorer ? but here is an example with a sleep to show you how it does work !
@echo off
Title Start and Kill Internet Explorer
Mode con cols=75 lines=5 & color 0B
echo(
echo Launching Internet Explorer ...
Start "" "%ProgramFiles%\Internet Explorer\iexplore.exe" "www.google.com"
:: Sleep for 20 seconds
Timeout /T 20 /NoBreak>NUL
echo(
echo Hit any Key to kill all instances of Internet Explorer
Pause>nul
Cls & Color 0C
echo(
echo Killing Internet Explorer Please wait for a while ...
Taskkill /IM "iexplore.exe" /F
pause
And if you want to see more features like how to start a process and how to kill one process or multiple processes at once that interact with user input with a dynamic menu you should take a look at this post ==> How to check and correct user input when he omit the extension .exe to kill the process?
Try this alternative without confirmation from the user input :
@echo off
Title Start and Kill Internet Explorer
Mode con cols=75 lines=5 & color 0B
echo(
echo Launching Internet Explorer ...
Start "" "%ProgramFiles%\Internet Explorer\iexplore.exe" "www.google.com"
:: Sleep for 10 seconds, you can change the SleepTime variable
set SleepTime=10
Timeout /T %SleepTime% /NoBreak>NUL
Cls & Color 0C
echo(
echo Killing Internet Explorer Please wait for a while ...
Taskkill /IM "iexplore.exe" /F