Windows 7 PCI wireless adapter unable to connect to a specific router

It seems like you've already gone through quite a few troubleshooting steps to resolve the issue with your D-Link PCI wireless adapter. Since you can connect to the same router with other devices, it's likely that the problem lies with the compatibility or settings of the PCI card itself. Here are a few additional steps you can try to diagnose the issue further: 1. Check Router Compatibility and Settings: - Ensure that your Netgear DGN1000 router is compatible with the D-Link DWA 525 adapter. - Verify that the router settings are compatible with the adapter (for example, the security type like WPA2, encryption type). - Verify that MAC address filtering is not enabled on your router. - Check if there are any specific router settings related to compatibility with certain wireless adapters. 2. Check Device Manager for PCI Card Status: - Go to Device Manager in Windows 7 (you can press Win + X to access Device Manager). - Look for the D-Link DWA 525 adapter under Network Adapters. - Ensure that there are no exclamation marks or error messages associated with the adapter. 3. Check Signal Strength: - Check the signal strength of the wireless network on your PC using the adapter. Low signal strength can lead to connection issues. 4. Reinstall the Driver: - Uninstall the current driver for the D-Link DWA 525 adapter. - Download the latest driver from the D-Link website and install it again. 5. Change Wireless Channel on Router: - Try changing the wireless channel on your router in case of interference issues. 6. Disable IPv6: - Sometimes disabling IPv6 on the network adapter properties can help solve connectivity issues. 7. Use Different PCIe Slot: - If possible, try installing the D-Link adapter in a different PCI Express slot on your PC. 8. Check for External Interference: - Ensure there are no physical obstructions or sources of interference near the PC that could be affecting the signal. 9. Reset TCP/IP Stack: - Open Command Prompt as an administrator and run the following commands: By systematically going through these additional steps, you might be able to pinpoint the exact cause of the connectivity issue with your D-Link wireless PCI adapter. If all else fails, you might want to consider contacting D-Link support for further assistance or seeking a replacement for the adapter if it's determined to be faulty.