Here is a list of things you can do to prevent downloaded files from becoming corrupted:

1. Use a reliable, high-speed internet connection.
2. Disable any anti-virus software that might be interfering with the download.
3. Disable any firewall software that might be blocking the download.
4. Make sure you have the latest version of the downloading program.
5. Check to make sure there is enough storage space available on your device.
6. Check to see if the compressed file type is compatible with your device.
7. Delete the partial, corrupted file before attempting to download again.