1. Please go here /xl7.9/intro.html to download Thunder again, and then uninstall and reinstall it. (Be sure to uninstall and reinstall to avoid covering up old problems. You can save the download record. Go to My Computer-Control Panel-Uninstall to uninstall. During the uninstallation, you will be prompted whether to keep the download history. Click Yes, and then install it in the same location. )

2. If there is still no response after double-clicking the installation package.

(1) Right-click the installation package-Properties-Digital Signature-After selecting an intermediate date-click View Details, and then check whether the message with normal digital signature is displayed in the pop-up box. If it is not normal, there is something wrong with the installation package and it needs to be downloaded again.

②win7 system, please right-click the installation package and choose to run the attempt as an administrator.

③ Restart the computer and press F8 to enter the installation safety mode.

3. If it still doesn't work, it is generally blocked by some software or some files in the system environment are damaged. You can directly try to install with 360 software housekeeper. If not, it is recommended to reinstall the computer system.

For more questions, please ask thunder network Platform.