The CyberFence trial can be used for free during the scheduled time.
Download the file below and then install CyberFence.

Parental Control / Parental Controls / Filtering Software / Web Filters / Parental Control Filtering / Internet Access Control / Internet Filtering Internet Parental Control / Porn Blocker / Safe Surfing / Porn Filter / Porn Filters / Web Filter / Parental Control Program / Internet Monitoring Internet Access Blocking / Internet Monitoring Software / Parental Control Software / Internet Protection / Content Filtering / Internet Monitor