usually these extensions cover more than 1 type of files :frowning: so i try just comment most used

AX - DXshow filter libraries

ACM - driver for Audio Compression Manager

BPL - library for Delphi, used by Borland compiler etc.

CNV - DB2 conversion libraries

DRV - Device drivers and so on

FON - type of font file, allows possible code execution …

QTX, Q3X, QTS - quicktime main libraries

PYD - Dynamic Python extension module in dll format

RLL - Microsoft SQLserver resource library

RPV - Real Player libraries for visual plugins

TLB - Borland library, OLE library etc.

WPC - Microsoft Word/WordPerfect file converter and/or mapping library

X32 - program extensions of macromedia software

XLL - Microsoft Excel Addin library

XRS - another RealPlayer plugin now for external resources

etc :slight_smile:

i’m really lazy to find all the description but all of them got possibility to get infected&executed …