The most dangerous Win32 apps are often the ones that don't trigger warnings because they are too new (zero-day malware) or too cleverly signed. Conversely, older legitimate software (e.g., a 2010 utility) will trigger alarms due to lack of digital signatures, scaring novice users away from functional tools.
When you double-click a .exe file, Windows 10 will show a "User Account Control" (UAC) prompt asking for permission. win32 application download for windows 10