I updated the BIOS yesterday. After that, the Internet connection suddenly dropped once while the Wireless network was still connected. Later, I experienced difficulties trying to use the Cisco Anyconnect. Then the mouse pointer icon became invisible within the window of a software. These problems all happened for the first time since I had this laptop. Today, I haven't experienced such problems. I hope the problems are gone. 当日更新BIOS后，Wifi当天突然掉过一次线（已连接状态，但是互联网连接断了，重置网络后修复）；后来，Cisco Anyconnect出问题，尝试了很多次才连接上；之后，鼠标在微信窗口内隐形了。这些问题都是购置电脑以来首次出现的，不过，到今天为止暂未再次出现。但今天zoom开会时，F5小喇叭静音和F8麦克风静音频繁出现同时自动亮灯，使得电脑突然静音，需要再手动按下这两个按键恢复声音。不知是否和BIOS有关，特别耽误事。