taskkill for particular user - batch-file

Question

how can i kill multiple task of same user we are using this two codes
Code no1
#ECHO OFF
TASKKILL /F /IM explorer.exe
cls
Echo "Please Specify the User ID"
Set /p u=
set USER=%u%#%userdomain%
Echo "Please Specify the PASSWORD"
runas /user:%USER% Explorer.exe
cls
echo "Press any key to Switch Back to Default USer Profile"
Pause
Echo "please enter your password again for verification"
runas /user:%USER% C:\switch.bat
pause
cls
start %windir%\explorer.exe
exit
Code no2 (this File name Switch.bat)
#echo off
TASKKILL /F /IM Explorer.exe
exit
Actually the general idea behind to create this it switches in win XP like win 7 without logging off
Issue is when it switch back to original profile
all the task of the second user doesnt stop
is that any way to stop all task for a specific user which are running

Answer 1

you can try with tskill . It can kill a process and accepts as parameter the user ID:
Kill explorer for the same user
setlocal enabledelayedexpansion
set exe_name=Explorer
for /f "skip=1 tokens=1,2,3" %%S in ('query user') do (
set "current_user=%%S"
if "!current_user:~0,1!" EQU ">" (
for /f "tokens=2 delims= " %%M in ('tasklist ^| find ^"%exe_name%^"') do (
tskill "%%M" /ID:%%U
)
)
)
endlocal
goto :eof
For all other users:
setlocal enabledelayedexpansion
set exe_name=Explorer
for /f "skip=1 tokens=1,2,3" %%S in ('query user') do (
set "current_user=%%S"
if "!current_user:~0,1!" NEQ ">" (
for /f "tokens=2 delims= " %%M in ('tasklist ^| find ^"%exe_name%^"') do (
tskill "%%M" /ID:%%U
)
)
)
endlocal
goto :eof

Answer 2

You can kill all processes of a particular user like this (provided you have admin privileges):
#echo off
taskkill /fi "username eq %1" /t /f
Run the script like this:
C:\>script.cmd joe
However, why don't you simply log the second user off instead of switching back? That would be the obvious (and much cleaner) solution. As admin you can even log off other users on the commandline:
logoff session
You can enumerate the sessions with query session (or qwinsta if the former doesn't work):
#echo off
for /f "tokens=3" %%s in ('qwinsta ^| find /i "joe"') do (
logoff %%s
)