I can\'t fix the issue at hand and my head is continually becoming balder or balder.
The issue at hand is that my SDK manager won\'t find my Java, nor my SWT file.
I Had the same problem, what happened in my machine is that somehow the xcopy was not beeing recognized. I solved the issue adding the xcopy path in the PATH enviroment variable. In my machine the xcopy.exe is located in windows\system32 folder, resulting in this (i have sdk 8, change to whatever you using):
PATH = C:\Program Files\Java\jdk1.8.0\bin;%SystemRoot%\system32