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QuickBoojks froze with the message 'Working - Writing formats and formulas 99%' when going to the Customers screen. ESC button doesn't work.
Thank you for dropping a post, @LMMK.
I'm here to help you get back to business and open QuickBooks without any glitch.
There are several possible causes why QuickBooks crashes/freezes, these are the following:
To resolve this, you may need to run the QuickBooks Install Diagnostic Tool (QBInstall Tool). This will help identify any component issues related to your QuickBooks Desktop. Here's how:
If the problem continues, you may need to reboot and temporarily disable your anti-virus program, rename the QBWUSER.ini file, or reinstall using a clean install. For the detailed process and steps, you may check this article: QuickBooks Desktop won't open, has stopped working, or not responding.
Please keep me posted with the result by adding a comment below. Have a wonderful day!