QuickBooks Desktop Pro 2024 version R15_81 on Windows has suddenly become extremely slow starting on Aug 22.

QBDT takes more than 10 min to open even small company files with minimal number of transactions (less than 10) and small Chart of Accounts. Even after taking many minutes to load a small company file, QBDT is still extremely slow to respond to any actions, like clicking anything on the menu bar on the top like File or Help. Tried this with various company files so it is not an issue with 1 file in particular. 

Solutions mentioned on the QuickBooks forums that we tried and that did NOT work:

-Reinstalling QBDT Pro 2024 using an old QBDT installer, which installs version R15_27. But QBDT was extremely slow even on this old version of R15_27.

-As version R15_27 was extremely slow, we then updated to version R15_81 by selecting Help > Update QuickBooks Desktop with "Reset" option selected. QBDT still extremely slow after updating to version R15_81.

-THEN, as the previous options didn't work, we repaired the software by selecting Control Panel > Uninstall a program > Quickbooks Desktop Pro 2024 > Repair. QBDT still extremely slow after "Repairing" the software. 

-We do not use Attachments with QBDT so there was no Attachments folder to move as a troubleshooting option.  

Please advise as it is currently impossible to work within QuickBooks Pro 2024.