[Windows 7] I need to close a program after it loads on startup.

You can use msconfig and disable those programs (search on the search bar for msconfig) or you can use CCleaner for example and disable them from there.

[edit] re-read and realized you'd already considered a batch file -- my NirCmd suggestion is probably redundant [/edit]

batch file code:

taskkill /F /IM mom.exe

taskkill /F /IM ccc.exe

1) open notepad
2) write this code
@echo off
taskkill /F /IM mom.exe
taskkill /F /IM ccc.exe
save as whatever.bat to anywhere you want
3) open task scheduler (just search it in startup)
4) create basic task
5) create name, then go to triggers
6) select on startup on "begin the task"
7) delay task for 15min, press ok
8) go to actions tab, press new
9) select start a program, then browse the script "whatever.bat", press ok
10) in general tab, find "configure for" and select windows 7, press ok
11) restart pc and test it

argh. I hate being tech savvy sometimes.

taskkill didn't work. I know I was right (I was using "taskkill /f /if mom.exe", etc.), but still didn't work. So I tried pskill. It worked once, then Windows stopped recognizing it as a valid executable, like it never existed.
So I had to download pskill from sysinternals. Did work, but I was using PIDs and they were generated each time the .exes were started.
Then again I had to hide the damn console because it's annoying, so I downloaded hstart (command is hstart.exe /NOCONSOLE "myBatchFile.bat").

In the end I had to download two external .exes to execute a very simple task. Stupid windows.