What system is the present machine? Regarding the yellow exclamation mark of wan miniport, this is caused by the untimely update of the currently known windows patch driver information, which has no influence on the use of the machine system.

If a 797 error occurs when the machine is connected to a broadband network, the modem connection device is usually not found. Have you tried to re-create the broadband connection test, can you get the machine back to normal?

If it is convenient, you can re-establish a broadband connection and try to get the machine back to normal. In addition, the network card driver should be manually uninstalled and reinstalled in official website to see if the machine can return to normal.

Driver lookup:/support/driver/defaultpage.aspx

If the debugging fails through the above scheme, you are welcome to contact us through online service.

Hotline: /lenovo/wsi/contact.html

Online consultation: /lenovo/

Wechat: official website scans the QR code in the lower right corner or the official WeChat account to search for "Lenovo Service".

You can get more thinking information through the following links.

/support/knowledge/knowledge home . aspx？ intcmp=thinkbd

I look forward to your satisfactory evaluation, thank you for your support to Lenovo, and wish you a happy life!