Searching for a "Full Version Free Download" of a specific old build (like 26.0.27.90) often leads to third-party sites that may host:
Bitdefender Antivirus Free for Windows: New Version Available Bitdefender Antivirus 26.0.27.90 Full Version Free Download
: Resolved "Access Denied" errors when attempting to restore files from quarantine on Windows 7 and 8. Searching for a "Full Version Free Download" of