Quick Summary
This error typically means that the Android operating system has determined that the APK file you're trying to install is corrupted, incomplete, or incompatible with your device. It can also mean that the security measures have flagged this app as unsafe or unauthorized.
Common Causes
- Corrupted APK File: The downloaded APK file may be corrupted during the download process due to network issues or other interruptions.
- Incomplete Download: The APK file was not fully downloaded, resulting in a truncated and invalid installation package.
- Incompatible Architecture: The APK file is designed for a different processor architecture (e.g., ARM64 vs ARMv7) than your device supports.
- Android OS Version Incompatibility: The app requires a higher or lower version of Android than what's currently installed on your device.
- Security Restrictions: Android's security settings (e.g., Play Protect) are blocking the installation due to potential security risks or an untrusted source.
- Insufficient Storage Space: There is not enough available storage space on your device to properly install the application.
Step-by-Step Fixes
Method 1: Redownload the APK File
Step 1: Delete the currently downloaded APK file from your device.
Step 2: Ensure you have a stable internet connection (preferably Wi-Fi).
Step 3: Download the APK file again from a trusted source. It is best to use the official website or a well-known reputable source.
Step 4: Try installing the newly downloaded APK file.
Method 2: Enable Installation from Unknown Sources
Step 1: Go to your device's Settings.
Step 2: Navigate to 'Apps & notifications' or 'Security' (the exact wording may vary depending on your Android version and device manufacturer).
Step 3: Look for 'Install unknown apps', 'Unknown sources', or similar security options.
Step 4: Find the app you use to install APKs (e.g., Chrome, Files app). Some devices may have a general toggle to install from unknown sources. If the toggle applies to a particular app used to download, tap on that app.
Step 5: Allow installation from that source by toggling the switch to 'On' or granting the app permission. Please use caution when enabling this setting as it opens your device to potential risks from malicious apps. Only enable it for apps you trust. Consider disabling or revoking permission afterward.
Step 6: Try installing the APK file again.
Method 3: Clear Cache and Data of the Installer App
Step 1: Go to your device's Settings.
Step 2:Navigate to 'Apps' or 'Apps & notifications'.
Step 3: Find the app you used to download the APK, such as Chrome or your file manager.
Step 4: Select 'Storage'.
Step 5: Tap 'Clear Cache' and then 'Clear Data' (Note: Clearing data will delete any settings and login information the app has stored. Be careful doing so).
Step 6: Try installing the APK file again.
Method 4: Check and Update Android OS Version
Step 1: Go to your device's Settings.
Step 2: Navigate to 'System' or 'About phone'.
Step 3: Look for 'Software update' or 'System update'.
Step 4: Check for available updates and install them if available. Ensure that your device is connected to a stable Wi-Fi network and has sufficient battery life before starting the update.
Step 5: After the update, try installing the APK file again.
Method 5: Verify Storage Space
Step 1: Go to your device's Settings.
Step 2: Navigate to 'Storage'.
Step 3: Check the available storage space on your device.
Step 4: If your device is low on storage, delete unnecessary files, apps, photos, or videos to free up space.
Step 5: Try installing the APK file again.