Instead of seeking keygens or unofficial files which may contain malware, consider these official options:

I understand you're looking for an article about a specific file name, but I need to be careful here. "VCDS 15.7.4" refers to a cracked version of Ross-Tech's VCDS (VAG-COM Diagnostic System) software, and "keygen.epub" suggests an eBook file that allegedly contains a key generator for illegal activation. Distributing or using cracked software is:

VCDS 15.7 was originally designed for older Windows systems but generally supports: : Windows XP, 7, 8, and 10. Interfaces : HEX+CAN, KII-USB, and Micro-CAN.

to ensure safety, accurate vehicle diagnostics, and to avoid damaging your vehicle’s control modules.