After the online banking of ABC opened the letter of credit, the website of ABC could not be opened, which had nothing to do with the letter of credit, but a browser problem.

1. Open IE browser, select Tools menu-""Internet Options-Advanced tab-click Restore default settings, then select Security, then select trusted sites, and then click Add corresponding URL to confirm. Do it. Click "OK" to close all IE browser windows;

2. Open IE browser, select Tools Menu-Internet Options-General Tab-Check the newer version of the stored webpage in the temporary Internet file settings, and choose to check every time you visit this page. Click "Delete files" in the temporary Internet file settings, tick before "Delete all offline content", and click OK to close the dialog box and close all IE windows;

3. Open IE browser, select Tools menu-Internet Options-Security tab, select Internet in the window "Please set security settings for web pages in different areas (Z)", then select custom level, and select "Download signed Activex controls" and "Run Activex" in Activex controls and plug-ins.

4. Click "Personal Online Banking Login" to enter the personal online banking login page. Click System Setup Guide at the bottom. After entering the next page, the first step is to click "Personal Online Banking Control", download and install, and then restart the computer.