When opening Cisco ASDM-IDM Launcher you get an error that says, “Windows cannot find ‘javaw.exe’. Make sure you typed the name correctly, and then try again.”
Add the path to the java installation in the PATH environment variable. For me the path was C:\Program Files (x86)\Java\jre7\bin but obviously it can be different depending on the Java version & your environment.
Oh, and I hate Java.