VM > Settings > Hardware > Hard Disk > Advanced > Independent, Persistent

  VM > Settings > Options > Snapshots > Just power off

  VM > Settings > Options > Unity >Uncheck every check box

VM > Settings > Options > Advanced > Input grabbed: High, Input ungrabbed: Low

  VM > Settings > Options > Advanced > Gather debugging infomation: None

  VM > Settings > Options > Advanced > Memory page trimming is not allowed : Check

  Edit > Preferences > memory > additional memory > Fit all virtual machine memory into reserved host RAM