My client is encountering intermittent but increasingly common problems with her PC which seem to be

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My client is encountering intermittent but increasingly common problems with her PC which seem to be related to emailingfrom within Reckon using Outlook 2016.  common entries in the Event log are:

Microsoft-Windows-RestartManager,10006,None,Application or service 'Reckon Accounts' could not be shut down..

and

Application Error,1000,(100),"Faulting application name: qbw32.exe, version: 25.0.4001.1270, time stamp: 0x56d7e75b

Faulting module name: QBWRPT32.dll, version: 25.0.4001.1270, time stamp: 0x56d7e903
Exception code: 0xc000041d
Fault offset: 0x00019dbe
Faulting process id: 0x2a84  Faulting application start time: 0x01d27e690d4b1073  Faulting application path: C:\Program Files (x86)\Intuit\Reckon Accounts 2016\qbw32.exe  Faulting module path: C:\Program Files (x86)\Intuit\Reckon Accounts 2016\QBWRPT32.dll

Outlook hangs and and on occasions restarting the PC Outlook needs to be repaired. I have tried looking at this from the Outlook end but MS basically are blaming interaction from other apps, hence this question. I would like to identify & eliminate what cause the quoted error report.

OS is Windows 10

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OS is Windows 10 
Not sure on what version of Reckon, but it is current as the PC was rebuilt late last year. I'll check .
As it is intermittent ( roughly once a week it is difficult to test with the sample file, however there are several PCs using the same data on a peer to peer Windows network ( one PC works purely as the "server") and the other do not have the same issue.
Outlook is POP.
Thanks for your help.

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Reckon is Reckon Enterprise 2016