Autodesk Mechanical Desktop 2009 is a 3D computer-aided design (CAD) software that was widely used for mechanical design, simulation, and analysis. It was part of the Autodesk Desktop series and was popular among engineers, designers, and manufacturers.

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thanks for the support! ,however this moment i have Zenok Free Antivirus 2012 good is the second version i think but ..recommend ... cheers!
Thanks for your information. I will made a look at Zenok.
thankyou for offering agood services for us i do use comodo for long time but it has no problem at all
What antivirus protection program can be used for Windows 2000 Professional?
latest version of most popular antivirus programs will work fine with Windows 2000.
I think for windows 7 it is avira or avast is the best option.or if you want to purchase buy kaspersky it is also the best but not free . any way have a nice day!!