Note: For proper operation, do not connect the wireless adapter to your computer before you install the software.
Now, please follow these steps:
I suggest that you can uninstall the drives and install it again.
1.Please go to user control panel of your PC----Uninstall Programs ----- find “REALTEK USB Wireless LAN Utility ---- Uninstall it ---reset Computer
download the newest drives from the official website of realtek directly
3. Install the newest drive, at this step. Do not plug the wifi adapter with your computer
4. After the drive was installed,click the logo on your desktop and plug the wifi adapter to your PC. (chose a different Ports)