I can’t directly host or attach driver files, but here’s how to get the Techwell TW6802B driver for Windows 7 64-bit:

Quick working driver info:

• Driver name: tw68x64.sys
• Device IDs:
  PCI\VEN_1797&DEV_6802
PCI\VEN_1797&DEV_6804 (compatible)

2. The Hardware Profile: The TW6802B

Manufactured by Techwell (now part of Intersil and subsequently Renesas), the TW6802B is a video decoder chip widely used in generic "no-name" DVR capture cards produced in the late 2000s and early 2010s.

• Function: It acts as a bridge, taking analog CCTV camera feeds (usually 4, 8, or 16 channels) and converting them into a digital stream readable by PC software.
• The Problem: These cards were sold under dozens of different brand names (often generic "DVR Card" listings on eBay or Alibaba), but they all shared the same TW6802B heart. This lack of a singular brand identity makes locating official support files a digital scavenger hunt.

If driver is unsigned or Windows blocks it

• Windows 7 x64 enforces driver signature by default. Options:
  • Obtain a signed driver from the vendor (preferred).
  • Temporarily disable driver signature enforcement for installation:
    • Reboot, press F8 during startup, choose “Disable Driver Signature Enforcement” (temporary until next reboot).
  • Use Test Mode (bcdedit /set testsigning on) — not recommended for production systems (less secure).

1. Use a generic "TW68" driver pack (most reliable)

Look for TW6802B Win7 64-bit driver from sources like:

• DriverGuide (driver ID: often "Techwell TW6802B Video Capture")
• System66.com (has legacy DVR drivers)
• BlueCherry (open-source Linux driver, but they may have Windows archives)

Search for:
TW6802_64bit_Win7.zip or TW6802B_Win7_x64_Driver

Prerequisites:

• Windows 7 64-bit (SP1 recommended)
• DVR card with TW6802B chip (check the card’s main chip; it should say TW6802B)
• Administrative access
• Backup your data (just in case)