Capita says that there is no solution to this and they suggest the only way to fix the issue is to rebuild the workstation, I beg to differ!
Here is the solution that has worked for me:
1. Perform a search in the directory C:\Windows on the PC with the error
2. Search for the dll file: hpzui4wm.dll
3. When these entries appear, rename or delete these dll files
Now log onto SIMS and access Nova-T.
Please let me know if this has solved your NTVDM error.