Hi,
First of all, visit http://www.microsoft.com/windows/compatibility/windows-7/en-us/Details.aspx?type=Software&p=Autodesk%203ds%20Max&v=Autodesk&uid=8&pf=0&pi=1&s=3ds%20max%202009&os=64-bit, there might be some compatibility issue currently, they are working on it.
What is the exact error message? If dotnet framework 2.0 is missing as you described, you can manually download it to check the result.
In case there is conflict somewhere, please test this issue in Windows Clean Boot mode. A Clean Boot will allow us to isolate any device drivers or programs that are loading at startup that may be causing a conflict with other device drivers or programs that are installed in your computer.
Start Windows in Clean Boot mode
Note: You must be logged on as an administrator or a member of the Administrators group to complete this procedure.
1) Click Start.
2) Copy and paste "msconfig" (without the quotation marks) in the Start Search box, and click Enter.
3) Switch to Services tab and then Check Hide All Microsoft Services.
4) Click Disable All.
5) Switch to the Startup tab and then Click Disable All.
6) Click OK.
7) Click Restart to restart the computer and test the issue.
If the problem does not occur, it indicates that the problem is related to one application or service we have disabled. You can use the MSCONFIG tool again to re-enable the disabled item one by one to find out the culprit.
In addition, tell us the model of your PC and display card.
