If your PC doesn't detect the device at all, you can try these verified third-party or manufacturer repositories: Lenovo Support : Provides a standalone HUAWEI Mobile Broadband Driver package
If the Microsoft trick fails, the most reliable community-sourced driver package is the or "Mobile Partner" driver suite. This package contains the correct .inf files for the E5573 series. huawei e5573cs322 driver for windows 10
: Some users have noted that Windows Updates may fail to download when connected through this MiFi due to default connection configurations. Microsoft Learn Key Product Specifications If your PC doesn't detect the device at
USB drivers if you connect via Wi-Fi. This is the "driverless" way to manage the device: Microsoft Learn Key Product Specifications USB drivers if
(temporarily): Reboot Windows 10, press F7 during startup to allow unsigned drivers, then install the Huawei driver from the device’s internal storage.
A surprisingly common issue. If the USB cable is a "charging only" cable (often included with cheap electronics), it will not transmit data.