Solution 1: Close QBW32.exe process from Task Bar:
To do so, select the ‘Start Task Manager’ option by clicking right on the ‘Windows Taskbar.’
Then from it, arrange the processes alphabetically by clicking on ‘Process Tab’ and ‘Image Name’ header in order to locate and select ‘EXE.’
After that, click on ‘End Process’ from ‘EXE’ options to close the ‘exe process.’
Now, try to open your QuickBooks program again, and still if you’re unable to open it, then it might be because of out-dated QuickBooks software version.
So, simply move on to the next method to download and install QuickBooks update.