controlled application 'Microsoft HTML Application' (of type System tool) has been detected

Question

has started popping up on a few machines today 
 its not listed here - https://www.sophos.com/en-us/threat-center/threat-analyses/controlled-applications.aspx 
 isnt it part of the operating system ?

Aditya Patel · Answer

HI Neilonaldson, 
 The application is added in Sophos Central and also is a Part of a Windows system and implemented in Internet Explorer. TO know more about the application you may visit the URL below . 
 https://en.wikipedia.org/wiki/HTML_Application 
 
 Thanks and Regards 
 Aditya Patel