When you install the Android SDK, it creates an android-sdk folder, in the folder you choose to install it in. The android-sdk folder contains an uninstall.exe file.
If you run this file, as well as deleting the android-sdk folder, it deletes the parent folder and all other sub-folders in the parent! I lost my entire development folder, which as the name suggests, contained a lot of development projects I was working on.
Losing my development folder is incredibly annoying, but it could have been worse. Imagine if I had installed it directly in the root? I would have lost my entire hard drive!
I can't believe a company as big and trusted as Google released such a devastating program. I'm not the only one that had this problem. It was first reported in June, but they did nothing. See the link below.