1. Open the custom level in IE Tools/Internet Options/Security/Security/Set "File Download" as enabled, "File Download Auto Prompt" as disabled and "Font Download" as enabled in the drop-down list of settings, and then press OK to apply.

2. Open IE Tools/Internet Options/Advanced/uncheck "Check the signature of downloaded programs" in the list below, tick "Allow running or installing software even if the signature is invalid", and then press Apply to confirm.

3. If the download failure still exists, run Gpedit.msc and confirm to open the group policy. Select user configuration on the left /Windows component InternetExplorer and double-click the security function on the right/double-click to restrict file download/there are three options on the right: Internet Explorer process, process list and all processes, and check whether their status options are unconfigured or disabled. If any configuration is "Enabled", double-click this item to change back to "Not Configured" setting, and each item should be determined by the application. After finishing the final setup, restart the computer.

4. If the download failure still exists, please modify the registry to download IE. Enter the regedit for confirmation, open the registry to find the subitem [HKEY _ Current _ User \ Software \ Microsoft \ Windows \ Current Version \ Internet Settings \ Area \ 3], find and double-click the item named "1803" in the right window, and change the value to "0" in the opened dialog box (if it is already 0).

If the download failure still exists, you can use the system that comes with the system to restore it until it can be downloaded. System reduction is reversible. If not, you can return it.