Your E5573 is in serial/COM port mode, not NDIS (network) mode. Solution: Log into the hotspot’s web interface ( 192.168.8.1 with username admin , password admin ). Go to Settings → Security → USB Tethering → Enable "USB Tethering" or "HiLink Mode" .
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 huawei e5573cs322 driver for windows 10
Desperate, he reached into his "tech junk" drawer and pulled out a dusty, pocket-sized device: the 4G Mobile Wi-Fi. It was his old reliable, a relic from his travel days. He plugged it into his Windows 10 machine, expecting a spark of life. Instead, he got the dreaded silence of a device not recognized. "Drivers," he whispered. Your E5573 is in serial/COM port mode, not