You can refer to the following troubleshooting steps for application installation failure:

1. If the remaining storage space is insufficient, the installation will fail. It is recommended to use iButler to clean up the storage space and maintain sufficient space for installation. .

2. If the software version signature is inconsistent, the installation will fail. Please back up the software data, uninstall the old version and then install it again.

3. App store installation should fail, which may be caused by data anomalies. You can go to Settings--Applications and Permissions--Application Management--App Store--Storage--Clear data and try again. .

4. Some software may be incompatible with the current version of Android system. It is recommended to download other similar software for use.

5. If the application is not installed through the "App Store/Game Center", please enter iManager--Application Management--Permission Management--Permissions--Install Unknown Application--Select Software--Set to Allow before proceeding with installation.

6. If a parsing error is prompted, it may be because the installation package file was damaged during downloading. It is recommended to download it again or change the download channel.

7. If it prompts "High-risk virus found", it means that the system has detected that the application is risky and has automatically prohibited the installation. If you still need to install it, you can go to Settings--Security/Security and Privacy--More Multiple security settings--App installation--Prohibit the installation of malicious applications--Turn off the function switch.

8. You can enter the vivo official website--My--Online Customer Service--Enter manual and consult online customer service for feedback.