There is no safe way to “update Adobe Reader 9 for daily use.” Upgrade to a modern free PDF reader instead.

Adobe Reader 9 was released in 2008 and reached its official “end of life” in 2013. This means Adobe no longer provides security updates, technical support, or fixes for this version. Using Adobe Reader 9 on a computer connected to the internet is a significant security risk , as known vulnerabilities can be exploited by malware.