I can attest to the fact that 15.61 runs quite well under Windows 10 ARM and Parallels 17. There are a few issues in twaeking usb microphone settings, but I'd say perfrormance is very close to what I'd experienced in a "pure" Windows 10 environment.

My computer is an M1 Macbook Air with 16gb RAM and a 512gb internal SSD. Best machine I've ever owned.

Andy - are you still able to find a version of windows 10 ARM?  I too was running just fine on 10 with Parallels on a M1 chip, but windows updated itself a few weeks ago to version 11 (since it was a beta version) and now it shows a splash screen and quits.  

Any ideas on how to find (and stay on) version 10?

Here's the XML version of the error from the event viewer. 

- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> 

- <System> 

<Provider Name="Application Error" /> 

<EventID Qualifiers="0">1000</EventID> 

<Version>0</Version> 

<Level>2</Level> 

<Task>100</Task> 

<Opcode>0</Opcode> 

<Keywords>0x80000000000000</Keywords> 

<TimeCreated SystemTime="2021-11-01T16:26:41.8052501Z" /> 

<EventRecordID>6859</EventRecordID> 

<Correlation /> 

<Execution ProcessID="10432" ThreadID="0" /> 

<Channel>Application</Channel> 

<Computer>PARKERTHOMA1F62</Computer> 

<Security /> 

</System> 

- <EventData> 

<Data>natspeak.exe</Data> 

<Data>15.61.200.10</Data> 

<Data>5f9f2ab1</Data> 

<Data>unknown</Data> 

<Data>0.0.0.0</Data> 

<Data>00000000</Data> 

<Data>c0000409</Data> 

<Data>76c1f720</Data> 

<Data>1358</Data> 

<Data>01d7cf3d407e33c7</Data> 

<Data>C:\Program Files (x86)\Nuance\NaturallySpeaking15\Program\natspeak.exe</Data> 

<Data>unknown</Data> 

<Data>89844c3c-7601-4197-b2c5-deed6a3a7de8</Data> 

<Data /> 

<Data /> 

</EventData> 

</Event>