Adobe Illustrator Cs 5.1 -with Serials- - 2010k... Page

If you need the functionality of CS5.1 without subscription costs, consider these options:

If you have a CS5.1 serial number (purchased from Adobe or a reseller before the discontinuation), you can still activate it. Adobe continues to support activation servers for CS2 through CS6. To install legally: Adobe Illustrator CS 5.1 -With Serials- - 2010k...

A more intuitive way to merge or erase overlapping shapes. If you need the functionality of CS5