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Hi, I'm Bhavik. Welcome to JustAnswer. I'm reviewing your question now, and will reply back ASAP.
Yes,As MS office and QUICKBOOKS are system software which get's installed in your system drive (generally it is C: drive)they get's deleted when you reisntall windows in PC. That's why you will have to reinstall both the programs again.
You must have loose all the data which were there in your c drive.