This specific query highlights a tension in the creative industry. On one hand, Adobe’s subscription model is a barrier for students or hobbyists in lower-income regions. On the other hand, the rights of the developers are bypassed when software is distributed illegally. This has led to the rise of Open Source alternatives like Inkscape or "buy-once" competitors like Affinity Designer, which offer a legal middle ground for those who cannot justify the Creative Cloud expense. Conclusion

While I have analyzed this from a perspective, were you actually looking for technical help with a legal installation of an older version, or perhaps a list of free alternatives to Illustrator?

Searching for and downloading software via unverified .rar files carries immense :

Because these files require the user to disable antivirus software to run a "patch" or "crack," they are perfect delivery systems for ransomware or keyloggers.

Pirated versions often have modified DLL files that can cause frequent crashes or conflicts with other official Adobe products.