If you don’t have a strict legacy requirement, consider these safer alternatives that are still free and lightweight:
Adobe Reader XI is optimized for older hardware and operating systems: Download Adobe Reader Xi 11.0.23
For everyone else, we strongly recommend upgrading to a modern PDF reader—or at the very least, installing Adobe Reader XI inside a locked-down virtual environment. Your data and privacy are worth more than a familiar interface. If you don’t have a strict legacy requirement,