This is often caused by a resolution mismatch or the "Aero" theme in Windows 7. Try switching to a Basic Theme to free up video overlay resources.
Because Techwell was primarily a semiconductor manufacturer (later acquired by Intersil), they often only provided the raw Software Development Kits (SDKs) to the actual card manufacturers. This means "official" drivers are rare, and you often have to rely on generic versions or original OEM software.
Ensure your card is actually a TW6802 or TW6802B by checking the chips on the card. dvr card techwell tw6802b driver for win 7 64 bit hot
Choose and point to the folder where you extracted the driver files. Select the .inf file for the 64-bit driver and proceed. Restart your computer. 5. Troubleshooting & FAQ
However, there are a few potential pathways. The most promising lead is a driver for the (version 1.2.0.0 ), dated June 27, 2016, specifically for Windows 7 64-bit . Its support for a wide range of hardware IDs, including PCI\VEN_1797&DEV_6801 , which corresponds to the TW6802B chip, suggests it may be compatible. This is often caused by a resolution mismatch
Because official standalone consumer packages from Techwell do not exist, you must rely on compatible generic packages or OEM archives.
Despite best efforts, sometimes Windows 7 64-bit refuses to accept legacy drivers because of security updates. If the TW6802B refuses to work: This means "official" drivers are rare, and you
This is a memory conflict. Your DVR card's PCI interrupt is shared with another device. Move the card to a different PCI slot. If using PCIe, disable "PCIe Active State Power Management" in Windows power settings.
Browse directly to the extracted folder on your desktop and select the TW68XX.inf file.