Here’s why, along with legitimate alternatives:
You can find original, unmodified ISOs for legacy purposes on the Internet Archive
Some users may be looking for a cracked version of Mikrotik 5.20. However, we must advise that using cracked software is not recommended, as it may pose security risks and violate software licensing agreements.
Running a cracked router OS is like leaving your front door unlocked with a sign saying "hackers welcome." Attackers actively scan for known vulnerabilities in outdated software, and cracks are a common vector for: