I noticed that after installing cdt, Eclipse always loads the default workspace. The workspace listed in the config.ini in osgi.instance.area.default
config.ini
osgi.instance.area.default
if your eclipse is auto-closing at startup you may do this: open the properties of your shortcut and add -clean at the end of the path. or do this in cmd : cd C:\PATH_TO_YOUR_ECLIPSE\eclipse -clean like mentioned earlier above comments