Intersil (the parent company) has officially stated that they do not provide direct end-user drivers and that users should contact the of the specific card. If these third-party drivers do not work, it may be because the card is a specific variant that requires proprietary software from the original vendor.
The Techwell TW6802B chipset is supported on , as well as newer versions like Windows 10. You typically need drivers for three distinct components of the card: dvr card techwell tw6802b driver for win 7 64 bit hot