Because I never get it to start Notepad. 
You can locate the file in C:\Documents and
Settings\username\tasklist.txt
If you want it to start, write this batch file instead:
tasklist /m > tasklist.txt
start notepad tasklist.txt
del tasklist.txt
Save it as tasklist.bat
Set the File type to All Files
Double click to run it.
For those curious, here's an explanation of the commands:
tasklist /m > tasklist.txt 
This will
call upon the tasklist program. Using the /m switch, it will show
all modules loaded with a particular process. This will then output
to a file called tasklist.txt
start notepad tasklist.txt Tells
Windows to Start Notepad immediately once the tasklist program has
finished listing everything.
del tasklist.txt This will
delete tasklist.txt file after you close Notepad.
