Ansys 2021 R1 starts to load then stops. Possible issue at C:\WINDOWS\System32\ucrtbase.dll

I have had Ansys 2021 R1 working up until the weekend. Since then it has stopped. When starting the workbench it start to load and says that it is Initializing Licensing but then stops.


I have reinstalled Ansys twice. I have updated the graphics drivers. I have removed a windows security update that was automatically updated at the weekend. I have updated SDK. I still cannot get it to load.


On the Task Manager you can see it as an active app then it disappears


Looking at the Event Viewer the details that are there are:

Faulting application name: AnsysFWW.exe, version: 21.1.0.0, time stamp: 0x5fa84779

Faulting module name: ucrtbase.dll, version: 10.0.18362.1110, time stamp: 0xb4cacc38

Exception code: 0xc0000409

Fault offset: 0x000000000006c408

Faulting process id: 0x2b98

Faulting application start time: 0x01d704bbae4feddc

Faulting application path: C:\Program Files\ANSYS Inc\ANSYS Student\v211\Framework\bin\Win64\AnsysFWW.exe

Faulting module path: C:\WINDOWS\System32\ucrtbase.dll

Report Id: 5d04a34e-7096-4e53-ae4d-5a5660a7d90c

Faulting package full name: 

Faulting package-relative application ID: 


Attached is an event log


I am very grateful for any help as currently I cannot take forward my M Eng dissertation


Thanks


Emily


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