An unexpected error occurred while updating required files
This might also happen when you try to sync with i Books, because it uses the same process.
To fix the issue, use the Share option in i Books on your device to email the PDF to yourself.
This saves a copy of the PDF in your email account and shares it with the email address you choose, which can be accessed from your computer.
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So I have been using Quicken for over 15 years and Last week I got a popup to update my Quicken 2015 to the latest version. It worked for two days and then all of a sudden I can't even start the application. I can do everything except when I close the application and reopen, I get the same Error Occurred screen and then I can't get back in. They took a perfectly working product and made is useless. You can have multiple versions of framework installed at the same time (https://support.microsoft.com/en-us/help/829019/benefits-of-the-microsoft--net-framework). id=49981&e6b34bbe-475b-1abd-2c51-b5034bcdd...) would solve your problem.
(...) When you work with Entity Framework Code First approach, you are creating your database tables from your model classes.