Thanks Greg for your speedy reply.
At the same time TurboCAD 10 Professional stopped working on Windows 10, so did my Office XP. Both have the same problem, they try to start and fail. And both pieces of software are from the same era, 2001-2004. And they both started acting up after an MS Windows 10 update from around the end of October or start of November 2022.
This is weird because much older software works just fine on my Window 10. To remedy the Office XP problem, I down graded to Office 2000 and re-installed the DOCX to DOC converter. But it still was a nuisance.
I have a licensed copy of TurboCAD 8 Professional and I was considering downgrading to it. I need the ACIS solid package that is only available in the professional versions of TurboCAD.
But the question remains, what in that updated changed Windows 10 so it no longer runs those two pieces of software? Was there some re-written DLL, API or MFC that affected software from the 2001 to 2004 era?
Before I came to the MS forum, I visited other forums and people were remarking that the same update affected their software from that same 2001-2004 era. I didn't find any remedies at the other forums, just complaints.
So far, MathCAD 5 (1996), MicroSim PSpice 7.1 (1996), WordPerfect Office 8 (1997), Visio 4 (1996) and many other older software titles that I have work fine on my Windows 10 machine.
Thanks for the suggestion of installing a "virtual Windows 7" machine. But, before I go to the trouble, I will test TurboCAD 10 Pro on one of my real Windows 7 machines and make sure some update did mess that up there as well. I thought Window 7 was no longer supported, but, for some reason I still get updates when I try to turn them off.
Do you pass on "bugs" to the programmers, or do you just help us users out of jams? It seems like "bugs" like this got fixed before. I was having a trouble connecting to older Windows XP machines after an update. But then a couple months later, I can see my Windows XP machines again through Window 10.
Thanks for the Help,
Vince