Do Not Install. Adobe officially ended support on December 31, 2020, and began blocking Flash content on January 12, 2021.
However, the very architecture that made Flash Player ActiveX powerful also sowed the seeds of its destruction. ActiveX was designed with the philosophy of "trust," assuming that if a user consented to run a control, it should have broad access to the system. This design philosophy was inherently insecure. Flash Player ActiveX became a notorious attack vector for malware, spyware, and viruses. Because the control had deep access to the Windows registry and file system, vulnerabilities in Flash allowed malicious actors to execute code on a victim’s machine simply by visiting a compromised website. flash player activex