Hi
as was said earlier this was a security enhancement introduced after W7. It is an extension to D.E.P (Data Execution Prevention).
It may be possible to bypass it by dissabling DEP depending on when it kicks in, have a look at this tutorial
https://www.vistax64.com/threads/dep-turn-on-or-off-for-programs.65790/
I take it you didn't have an external back-up, or an earlier restore point