The anti-virus software, Kaspersky, may block the file download function. If you are using Kaspersky anti virus software on your PC, please temporary disable some settings in the software and try to download the files again.
1. Under Web Anti-Virus, Click Enable Web Anti-Virus, click Setting.
2. Under Trusted URLs, click “Do not scan web traffic from trusted URLs:”
3. Click Add and add the link “*.hku.hk”
4. Click OK and Save.