Uninstall QB and rename all the ‘Intuit folders‘.

You can find these folders here:

• C:\ProgramData\Intuit\QuickBooks (year)
• C:\Users\(current user)\AppData\Local\Intuit\QuickBooks (year)
• Files\Intuit\QuickBooks(year)
• 64-bit version C:\Program Files (x86)\Intuit\QuickBooks (year)

There are chances that you will not be allowed to rename the file, in that case you can follow the below steps:

• Right-click on ‘Windows Taskbar‘ and click on ‘Task Manager‘.
• Choose the ‘Processes Tab‘.
• Choose the ‘column heading‘ with ‘Image Name‘ and select the ‘alphabetical order‘ in which the process will take place.
• Under the image name column, you will find the following files and you have to select the same: ‘QBDBMgrN.exe, QBDBMgr.exe, QBCFMonitorService.exe, Qbw32.exe‘
• Click on ‘End Process‘.
• You will get a message “WARNING: Terminating a process can cause undesired results including loss of data and system inability.” Select ‘Yes‘.
• Finally Reinstall the QuickBooks application.