Please unplug the U shield and check whether there is an unknown driver with a question mark in the smart card reader of the device manager of the computer. If so, click the right mouse button to uninstall it and restart the computer. Then install the driver again and insert the certificate. It is recommended that you reinstall the operating system and upgrade or replace the safe computer before using it.

If you can't solve your problem, I suggest you take your valid ID card, online banking registration card and U-shield certificate to the local designated outlets to check whether the certificate status is normal. If not, please handle the certificate recovery business at that time. Please call the local 95588 for information about the outlets.