You will need to enter both the serial number and the product key for the suite on the ‘User and Product Information' page of the install wizard. As you cannot change this after the install you will need to uninstall and reinstall. The product key for Autodesk 3ds Max Entertainment Creation Suite 2011 is 661C1. Double check the serial number and product key values in the email you received or on Subscription Center so you don't have to reinstall again.
Your best bet is to get the serial number and product key information then go from there which might require a reinstall and cleaning out some folders. Are you using the installer for the suite or individual product installers? The suite installer should be used and should not produce this .pit error.
Subscription customers who are in the role of Software Coordinator will have received an email. The email, which is sent from Download@autodesksubscription.com, contains the customer's serial number and the product key, which is needed for installation. Please check junk/spam folders because the emails sometimes end up there.
Customers who have misplaced their notification email can access their serial number and product key directly from the Subscription Center:
1. Go to Contract Administration
2. Then click on Coverage Report
3. Then, under the Contracts section, click on your contract number.
4. Products are listed in the Products section with serial numbers and product keys.
Customers who are experiencing problems with their Subscription upgrade can contact the Business Center at subscription-team@autodesk.com.
The error for the .pit file can be resolved by deleting the ProductInformation.pit file found on the workstation in the following locations:
Windows XP:
C:\Documents and settings\All Users\Application Data\Autodesk\ADLM\ProductInformation.pit
Windows Vista, Windows 7:
C:\ProgramData\Autodesk\ADLM\ProductInformation.pit
Douglas Lauritsen, Autodesk Product Support
Right click the Motion Builder folder then rename it to something else. Maybe append was or old as a prefix or suffix to the user name.
Did you delete the ProductInformation.pit or CascadeInfo.cas from "C:\Documents and Settings\All Users\Application Data\Autodesk\Adlm" or "C:\ProgramData\Autodesk\ADLM"? Start with these and see if the installer completes.
Let us know how it works out. Please provide details like the error message you are getting, product name, operating system, etc.
Douglas Lauritsen, Autodesk Product SupportC:\Program Files\Autodesk\Civil 3D 2011 is the Civil 3D folder equivalent of the Motion Builder folder. The issue you are having is probably not the same as the Motion Builder user.
You have already done many of the next steps that I would recommend namely deleting the install folder in Program Files, the user's local and roaming folders, and two registry entries. Don't forget the All Users local folder for Civil 3D.
After that I'd suggest installation with Diagnostic Mode so that you can eliminate driver and applications that may be preventing the install. Use Start > Run, type MSCONFIG, click OK. In the System Configuration Utility dialog choose the General tab and choose the Diagnostic Startup radio button. Once Diagnostic Startup is chooses choose OK and follow the prompts to reboot. When done installing set MSCONFIG back to Normal Startup and reboot again.
Douglas Lauritsen, Autodesk Product Support