AMD Athlon 64 with SSE2 technology, AMD Opteron® processor with SSE2 technology, Intel® Xeon® processor with Intel EM64T support and SSE2 technology, or Intel Pentium 4 with Intel EM64T support and SSE2 technologyĪdditional Requirements for 3D Modeling (All Configurations).Microsoft Windows 7 Enterprise, Ultimate, Professional, or Home Premium ( compare Windows 7 versions) Microsoft Windows Vista Enterprise, Business, or Ultimate (SP1 or later) ( compare Windows Vista versions) or Microsoft Windows XP Professional (SP2 or later).Microsoft® Internet Explorer® 7.0 or later.1,280 x 1,024 true color video display adapter 128 MB or greater, Microsoft® Direct3D®-capable workstation-class graphics card.1.8 GB free disk space for installation.For Windows Vista or Windows 7: Intel® Pentium® 4 or AMD Athlon® dual-core processor, 3.0 GHz or higher with SSE2 technology for Windows XP: Intel Pentium 4 or AMD Athlon dual-core processor, 1.6 GHz or higher with SSE2 technology.Microsoft® Windows® 7 Enterprise, Ultimate, Professional, or Home Premium ( compare Windows 7 versions) Microsoft® Windows Vista® Enterprise, Business, Ultimate, or Home Premium (SP1 or later) ( compare Windows Vista versions) or Microsoft® Windows® XP Professional or Home edition (SP2 or later).Now if you really installed AutoCAD rather than AutoCAD LT, then of course these are different applications with different serial numbers. (BTW - for those of you reading this who had student version and then tried to install commercial version the process is the same - no need to uninstall/reinstall - the programs are identical, only the license terms of use are different, so simply change the serial number and reactivate.) While in the program go to Help>About AutoCAD LT>Program Information and click Change Serial Number and enter your serial number and follow on-screen instructions to activate. Simply start the program and click Activate and follow the on-screen instructions - or So if you downloaded AutoCAD LT and the software you purchased is valid - you do not need to uninstall/reinstall. You downloaded the trial version of what? LT? I didn't know you could download trial of LT.īut all Autodesk software initially installs in 30-day trial mode. (steep learning curve, but it installed and functions within parameters.) so I downloaded the 64 bit trial version from Autodesk.

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