I sent a pm after I posted, but before the post was approved (thankfully).
There was indeed a virus on my PC that infected the exe right at compile time!
I have moved the project to a new PC, and have it sorted:
Also fixed a GUI issue with overlapping objects depending on Windows version.
Originally Posted by s2325
You can not trust Avast.
It's an old virus "Virtob" and Mcafee free virus scan didn't get it.
I love Windows
The whole installation will have to go