I tried it multiple times with different downloads (thinking the download may have corrupted the first one) and the result was the same.
Check this out --->>>> http://tinyurl.com/d2hxo
You didn't quit Notepad++ during the installation - maybe it hide in system tray?
It wasn't running at all.
Then I have no idea.
Redownload it from a different mirroe site may change someething.
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