Troubleshooting: Update malware detection section

Troubleshooting.md

@@ -224,12 +224,11 @@ We have had reports that Anti-Virus software such as:
  - AVG Anti-Virus
  - BitDefender
  - MalwareBytes
+ - (Microsoft) Windows Defender
 
 can sometimes report that either one of our installers (e.g.
 EDMarketConnector_win_5.0.0.msi) or an executable therein is malicious in
-some manner.  This has invariably always been a false positive.  Microsoft's
-Windows Defender on Windows 10 never has any issue with any of our application
-files.
+some manner.  This has invariably always been a false positive.
 
 The .msi files we distribute are built either on a trusted developer's 
 machine, or on GitHub itself (but then downloaded to a developer's machine 
@@ -240,6 +239,17 @@ See discussion in [EDMC 5.0.0. Flagged at Malware by AVG Anti Virus #1058](https
 for more details about the 'cause' of this, including links to py2exe 
 issues about it.
 
+Our working assumption is that some malware authors also use py2exe, or
+something similar, to build python scripts into windows executables.
+Those then get correctly flagged as malware by various vendors, but
+there's then collateral damage from them identifying actually innocent
+parts of those malware executables as an issue.  That then subsequently
+causes them to misidentify innocent programs built that way as malware.
+
+Every time we've reported the specific file(s) to an AV vendor and
+they've looked at them more closely they've then come back to us and
+admitted it was a false positive.
+
 It might be worth trying a manual download and install, if what you're 
 Anti-Virus is objecting to is the EDMarketConnector.exe -> WinSparkle.dll 
 -> Download -> Run Installer chain: