I understand you are missing the hpzidr12.dll file and it has been included in this forum post as a zip file you can put in the system 32 folder. If this doesn't help you, you will have to do a clean install and try the installation again. Let me know if this helps you locate the file you need and if not I have a few more questions for you:
1. What is the system type of your Windows 7 PC?
2. What brand is your PC (HP, Dell, etc)?
3. Do you have any other error messages?
