Installation & Licensing

[#1]

I've been trying to install Autocad 2011 on my desktop which runs on windows 7

then whenever i log in, and click onto the design software, it keeps prompting me to log in which i have already done

i have tried multiple times and it's happening again and again so i wonder what's wrong?

thanks for the help!

[#2]

not sure what logon screen it is , could you post the screen shot please.

Did you install the software as administrator ?

please try to turn off UAC

http://windows.microsoft.com/en-US/windows-vista/Turn-User-Account-Control-on-or-off

or try a clean install in diagnostics mode

http://usa.autodesk.com/getdoc/id=TS75218

[#3]

Is your network restricted by your IT Manager via proxy server or similar?  You may not have full access to the Internet or a network resource that AutoCAD is trying to reach.