Installation Help from Autodesk is at this forum (looks like they moved you here already while I was typing this email):
If you use REVIT, you probably also purchased a subscription. Visit the Subscription Page for direct contact. Someone somewhere sent you that information if you did purchase a subscription:
You can also use this site to get a new authorization number if, as you note, the other installations were mistakes:
Call Autodesk Product Registration and Authorization (during normal business hours for each region):
1-800-551-1490 > Option 1 (English) > Option 1 > (Stand-alone)
Asia / Pacific: 65.6735.5688
Europe / Middle East / Asia: 41.32.723.9595
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