F4 button opens file in notepad with generic icon.

[Usher]

There may be some malware protection - MS decided to display proper icon only when the program is run from its registered location.Other locations are suspicious. it looks like they don't trust even their own signed apps.

[petermad]

MS decided to display proper icon only when the program is run from its registered location.Other locations are suspicious.

But then I would expect for example ICLView to show the embedded icon anyway, and it don't