If your Windows 7 or 10 PC fails to recognize the E5576, follow this manual process.
A dedicated One-click Driver download tool is available for Windows computers to simplify the process. Huawei Mobile Wifi E5576 Driver Download
If Method 1 failed (or your Windows version blocked the auto-run feature), you can download the generic Huawei management software, which includes the necessary drivers for the E5576. If your Windows 7 or 10 PC fails
If the plug-and-play feature fails, be cautious of third-party "driver download" websites, as they often contain malware. Official Support : Visit the Huawei Consumer Support Search by Serial Number Huawei Mobile Wifi E5576 Driver Download