You might see "portable ETABS 2013" on forums. These are heavily cracked versions that don't require installation. – they are the #1 source of malware.
Minimum: Supporting 1980x1080 resolution and 16 bits colors for standard (GDI+) graphics mode. 1GB VRAM for graphics. Recommended: Computers and Structures, Inc. ETABS 2013 Tutorial for RC Buildings | PDF - Scribd DOWNLOAD FREE ETABS 2013
If your intention is to create a feature for legally distributing or accessing ETABS 2013 or similar software, here are some steps and considerations: You might see "portable ETABS 2013" on forums
CSI provides a 1-year free student license for the (ETABS v20+). You cannot legally get ETABS 2013 for free from CSI, but the new version is superior. DOWNLOAD FREE ETABS 2013
Here is why downloading these is a :