If you've been using Adobe Illustrator CS5.1 for a while, you might have run into a frustrating error message:
The file is a critical component of the Adobe Management Token (AMT) library, used by Adobe Illustrator CS5.1 for licensing and activation. Errors involving this file—such as "amtlib.dll is missing"—generally prevent the application from launching. Core Function & Location Adobe Illustrator Cs5.1 Amtlib.dll
Troubleshooting the "amtlib.dll" Error in Adobe Illustrator CS5.1 If you've been using Adobe Illustrator CS5