Can't open Quickbooks Desktop Pro Plus

Thank you for visiting the QuickBooks Community and for sharing detailed information about your concern, LindaMac2.I can also see you have already performed steps to fix the error you received. With this, I'll share another step to ensure you can open and organize your QuickBooks smoothly.

When installing and preparing your QuickBooks program, you have to make sure that the computer meets the system requirements. Also, have your product and license number entered to ensure that the program run without errors. That could also be the reason why you encountered the unusual message you mentioned. 

To fix your issue, I suggest finding your product and license number and entering them when preparing for the installation of your QuickBooks Desktop. Beforehand, you can uninstall QuickBooks 2023 and install it again to enter the mentioned number. Then, you can visit your account management portal (CAMPS) to get your product and license number.

However, if you bought a digital version of QuickBooks Desktop from our website, your product info is the original purchase confirmation email. If you bought QuickBooks from a retail store, look for this label on the original packaging next to the UPC Code.

Lastly, you may refer to this article to see steps on how you can update your QuickBooks license and product info to make sure your program details stay accurate: Change a QuickBooks Desktop license number or product code.

I'll be right here if you need further help to manage your QBDT. I'm always around to help, LindaMac2. Have a great day!

Thank you, Christie Ann for your response. My computer system requirements are fine - no problem there. Since I ordered the 2022 version from the website, that's the only order that shows up in my account management portal. I was doing the automatic update to the 2023 version (I assume) when I first got an error message. It was a 3771 error message with a "yes" button to online help and I followed these instructions which didn't work for me. If I take your suggestion and try to uninstall and reinstall the 2023 Quickbooks, I don't have the product number. When I installed it earlier this week, I was being directed by the support Desktop Pro expert who gave me the product number to enter. I didn't write it down. I have my license number. The article link you sent "Change a Quickbooks Desktop license number, etc" only can be done from the open program. Since I can't open QuickBooks, I can't try that, but it is useful to know for future reference. The file that I sent you with my post mentions that besides the qbregistration.dat file problem, a windows component, MSXML might be damaged or missing. I found this article about fixing that: https://quickbooks.intuit.com/learn-support/en-us/help-article/product-setup/repair-microsoft-msxml/...

I can try fixing, but I still need my product number for 2023 version to uninstall and reinstall it. I'm attaching the two error messages along with the re-created qbregistration.dat file. There may be an error in this file. Can you help with that? I know the product number is wrong - it's the number for my 2022 version I ordered. I've removed my license number for security reasons.