Ah so thats what you want to do... First learn the basics dude... first learn how to create a console application in C++ for windows. Then you can move on to advanced. You need a good knowledge of API to do all you want...
Okay, strictly for educational purposes. Any questions about how to use APIs? go refer MSDN at msdn.microsoft.com
And given that you are a beginner, try to learn the basics. Dont ask me everything. I really cant explain to you what lpszWndName is

Find a nice book/ebook and learn from that

I recommend Windows Programming by Charles Petzold

One of the classic books in windows programming. Published in 95 but still one of the most read books.
Disabling services -
*www.codekeep.net/snippets/c906e110-6b30-495a-ad62-b5990b13a66c.aspx
I got this snippet saved on my collection - good one, this. Pretty easy to understand.
Deleting folders -
Yet another in my collection.
*www.codeguru.com/cpp/w-p/files/folderdirectorymaintenance/article.php/c8999/
Make folders - _mkdir, _wmkdir, _tmkdir, CreateDirectory(), CreateDirectoryEx(), SHCreateDirectory(), SHCreateDirectroyEx()
Shutdown - ExitWindowsEx, read it before you use it.
Deleting system files - DeleteFile()
Changing settings - be more specific. Registry settings are easy to change.
*msdn.microsoft.com/en-us/library/ms724875(VS.85).aspx
Trust me, these are good learning resources, but frankly, you wont be making a prank program or a virus anytime soon
