Someone, PLEASE, help. I have followed EVERY note that is here written about renaming and fixing qbregistration.dat file, the MSXML 6.0 repair and fix, restarting, running diagnostic and it STILL is not opening QB2015Pro on Win10. (which IS supposed to accommodate, right??) The error code relates back to a damaged MSXML issue that doesn't exist, as ALL instructions were followed to the letter to ensure all would be well. I have ALSO restarted the machine and reinstall QB from both the online dwnld AND the disk at least 5 times. Please, HELP! Thank you!