In Windows 7 you will receive the following error when attempting to open a file in QTO
Fortunately Autodesk support was extremely fast to respond (3 hours) with this solution:
The ADOX file is a file required for VBA applications that the 2010 QTO installer does not install into Windows 7. A manual copy of the Vista version of this file into the program should correct this issue. You will need Administrator rights to perform this operation. Here is a process for you to try:
Copy and install the ADOX file:
1.) Close Quantity Takeoff.
2.) Locate the following path\file on the install DVD: \x86\Autodesk\QTO\Vista\ADOX.DLL
3.) Copy the ADOX.DLL file to the installed QTO directory:
C:\Program Files (x86)\Autodesk\Autodesk Quantity Takeoff 2010\
4.) Restart QTO.
5.) Open a new or existing project.