Download Errors

The "HEAD Error" seen when trying to download a product means that your network is interrupting the STACKS desktop app's ability to talk to our servers. Things that could cause this include:

• DNS Issues: The Domain Name System your computer uses is having difficulty resolving the URL of our storage platform. Try switching from your default DNS service (typically your Internet Service Provider) to more reliable one like Google or Cloudflare.
• Proxied or Restricted Network: School, work, or public Wi-Fi networks often block or filter traffic. Try switching to a home network or mobile hotspot.
• VPN or Local Proxy Server: VPNs or local proxy tools can interfere with secure connections. Disconnect or disable them before trying again.
• Firewall or Antivirus Blocking the Request: Windows Defender or third-party antivirus software may block downloads. Temporarily disable them if you’re on a trusted network, then try again.
• HTTPS or TLS Interception by Security Tools: Some antivirus or parental control tools scan encrypted traffic, which can break downloads. Look for settings like “HTTPS scanning” or “web protection” and try disabling them temporarily.
• Incorrect System Time/Date: Make sure your computer’s clock is accurate; a mismatched time can prevent secure connections.
• Outdated Operating System or Software: Older systems (like Windows 7 or earlier) may not support modern security protocols. Update your OS and browser if possible.
• Corrupted or Outdated Certificates: A broken certificate store can block TLS connections. Ensure your system’s root certificates are up to date.
• Malware or Unwanted Software: Malicious software can intercept or block network traffic. Run a malware scan if you suspect this might be the case.