I can't connect to bdownload.fosshub.com, which hosts the Android-x86 images. Are those download links working for you?
Fosshub was owned and trojaned some days ago, be careful with that site. The other download link should work (there are checksums in release notes).
They also mirror releases to Sourceforge:
https://sourceforge.net/projects/android-x86/files/
If you only need to use an app and not the rest of the environment you can also run it as a Chrome plugin under ARC and not mess with virtualization at all.