Cracked software websites are notorious for distributing malware. Files named keygen.exe, patch.exe, or loader.dll often contain:

Quite Software releases regular updates for QIP5 to fix bugs, add new imposition algorithms, and maintain compatibility with Acrobat updates (including security patches). A cracked version will never update, leaving you vulnerable to crashes and security exploits.

If you are a professional designer, printer, or prepress operator, the investment in a legitimate license pays for itself in a few jobs.