This regex explicitly matches the given email addresses, phone numbers, date formats, ID codes and hashtags (including the requirement of identical segments), valid Windows file paths with proper escaped backslashes, and specifically handles the 'privateKEY' word ensuring it is not preceded by 'not'. Negative lookbehind ensures 'not' condition while capturing groups and backreferences ensure segments repetition in IDs and hashtags. The detailed construction ensures matching exactly what's required.