Windows XP Professional x64 Edition (SP2+), Windows Vista (SP1+), or Windows 7.
1024 x 768 display with True Color; a Direct3D-capable workstation-class card is needed for 3D work. The "Portable" Version: What You Should Know
A "portable" version of software typically refers to an edition that runs without a traditional installation, often from a USB drive. System requirements for AutoCAD MEP 2010 - Autodesk
The 2010 release was the first to use a new DWG file format that remained standard through the 2012 version. Notable improvements included:
AMD Athlon 64, Opteron, Intel Xeon with EM64T support, or Intel Pentium 4 with EM64T (all requiring SSE2 technology).
Improved the ability to export and import high-quality PDF files for easier sharing.
Introduced constraints to maintain specific relationships between geometry, ensuring design intent remains intact.
Minimum 2 GB RAM (though 4 GB+ is recommended for 3D modeling).