I found a actual fix for me and thought someone might benefit from it. I am not a accountant or QB user, I am a contractor looking for a fix. QB technicians have never been any help so I stopped trying 15 years ago in calling them for anything, at least the user community has helped at times.
My customer had someone successfully duplicating his business checks and cashing them. His bank, Huntington Bank, implemented a scheduled task that runs every 20 minutes to only cash checks that were in Quickbooks. The computer that runs the scheduled task would freeze up with the "log into Intuit" which was preventing QB and the bank synchronizations causing vendors to not be able to cash checks. This computer is not used by any user and in a locked room, Alt-F4 doesn't help in this situation and is laughable since this is not a fix but rather a work around (takes me back to my Novel days lol), all users access QB via a RDP connection to our terminal server, which has never had this issue.
My customer had tried TSheets for a brief time and did not like it and switched to ADP for payroll. The Windows Registry didn't clean up when TSheets was removed, and was causing issues. If you are using QB payroll services this may not work for you but worked for me.
In the registry at Computer\HKEY_CURRENT_USER\Software\Intuit\QBWebConnector\SOAPWebServices I removed all settings for TSheets, and removed any other values within Computer\HKEY_CURRENT_USER\Software\Intuit that referenced TSheets. I compared the registry from the terminal server that did not have the issue so I could safely cleanup the affected computer (export registry keys for intuit to be safe).
If you are using QB/Intuit payroll services this may not be of any help, but I would check the SOAPWebServices key in the registry if you are not using QB payroll. At least you could remove the settings for any computer that does not need the payroll services.
Hope this helps someone out there...
