It sounds like you're experiencing a frustrating issue with your network connection. There are several factors that could be causing this problem with your USB NIC. Here are some steps you can take to potentially resolve the issue:
1. Update Your USB NIC Drivers: Outdated or incompatible drivers can often cause connectivity issues. Visit the Realtek website or the website of the vendor from which you purchased the NIC, and download the latest drivers for your specific model.
2. Change Power Management Settings: Windows may be turning off your USB NIC to save power. To change this setting:
- Go to Device Manager.
- Find your USB NIC under the Network adapters section.
- Right-click on the NIC and select...