According to the beginner guide, to setup the ADT Plugin, one of the procedures is
http://developer.android.com/sdk/eclipse-adt.html#installing
For the SDK Location in the main
panel, click Browse… and locate your
downloaded SDK directory.
I went to Program Files, found Android directory, but none of those works.
Upon research, I found out that Android developers have warned me to take note of the SDK directory, which I didn’t.
Now my question is, how do I get that directory path? I don’t want to reinstall the SDK, and then install the updates (lots of mess…)
Thanks for the help!
Edited
That exe that you guys wanted me to look for is indeed inside platform-tools.
I installed Android SDK, and it gives me Android SDK Manager. So I am guessing I had the right thing installed on my PC.

You can search your hard drive for one of the programs that’s installed with the SDK. For instance, if you search for
aapt.exeoradb.exe, they will be in theplatform-toolsdirectory underneath the installation directory (which is what you’re after).