Because this query involves software activation keys and terms like "exclusive free," it is important to address security and licensing first. Parallels Desktop is a proprietary, paid software application. There are no legitimate, legal sources that provide free activation keys, serial numbers, or "cracks" for Parallels Desktop 17.
[insert form]
If $80/year feels steep, VMware Fusion is now completely free for personal use and performs admirably for most tasks. The student discount brings Parallels down to roughly $40-$50/year—affordable for most students.