It sounds like you are facing connectivity issues with your LAN connection after upgrading from Windows Vista to Windows 7. Here are a few troubleshooting steps you can try to resolve this problem: 1. Update Network Drivers: - Outdated or incompatible network drivers can sometimes cause connection issues. Try updating your network adapter drivers to the latest version. - You can usually find the latest drivers on the manufacturer's website or through Windows Update. 2. Check Network Cable: - Ensure that your LAN cable is not damaged and is securely connected to both your computer and the hub. - Consider trying a different LAN cable to rule out any issues with the current one. 3. Modify Power Settings: - Sometimes, power-saving settings can affect network connectivity. Make sure that your network adapter is not set to power-saving mode. - You can adjust power settings in the Device Manager under the properties of your network adapter. 4. Disable Power Management for the Network Adapter: - To prevent Windows from turning off your network adapter to save power, follow these steps: - Right-click on "Computer" or "This PC" and select "Manage." - Go to "Device Manager" and expand the "Network Adapters" section. - Right-click on your network adapter, choose "Properties," and navigate to the "Power Management" tab. Uncheck the option that allows the computer to turn off the device to save power. 5. Check Firewall and Antivirus Software: - Sometimes, security software can interfere with network connections. Temporarily disable your firewall and antivirus software to see if they are causing the issue. 6. Router Configuration: - Check the router settings for any specific configurations related to your Windows 7 computer. - Ensure that the router firmware is up to date. 7. Torrent Client Settings: - In your torrent client (e.g., BitComet), try adjusting the settings related to network connections. You can limit the number of connections or change other settings to see if it improves stability. Once you have tried these steps, monitor your connection to see if the issue persists. If the problem continues, please provide more details about your network setup, such as IP settings, subnet mask, default gateway, DNS settings, etc., so that further assistance can be provided to help you troubleshoot the issue.