Hi Josef,
it is kind of strange. Sorry to read that you are having problems.
So we need to find a way to get more infos.
Maybe we need to find out which instruction is causing the problem in the first place, unfortunately this may have to be done with debugging tools.
We should try to exclude that the files were manipulated, can you compute checksums?
Taking your screenshot and typing in the numbers:
“The instuction at 0x000000007266CCE0 referenced memory at 0x00000000756DD488. The memory could not be read.”
The generally seems to mean an problem that code tries to access some parts which it shouldn’t. See some hints for this access to a zero pointer or so:
https://stackoverflow.com/questions/38743615/how-to-diagnose-the-instruction-at-0x-referenced-memory-at-0x00000000
However if this was a general problem with Gpg4win, we’d probably had more reports, so there must be additional factors triggering this.
Regards,
Bernhard