Hmm no, Windows Defender is turned off. This is on a University PC that is running Microsoft System Center Endpoint Protection Client as the Antivirus. The message that popped up about the RICHTX32.OCX error wasn't an antivirus message though, it was a general windows message that said ""component richtx32.ocx or one of it's dependencies not correctly registered: a file is missing or invalid".
Something to do with Visual basic runtime files packaged in with PfE? Not sure why only I got this message though, no doubt something my end. I just downloaded the file manually, placed it in the SysWOW64 folder and registered it manually.