Check if crashdumps are being collected in
%localappdata%\CrashDumps folder. If not, you need to
enable them.
Have you checked Event Viewer? You can filter the System and Application event logs to show Errors only. All crashes will have one or two entries there with some details about the crash reason.
The log shows MC was analyzing audio; last file before the crash was this one, which may be corrupt:
0662968: 17200: Import: AnalyzeAudio: Analyzing: E:\Agent Downloads\alt.binaries.sounds.mp3.folk\Ed McCurdy - Twa Corbies, The - Ballad Record, The - 3.mp3
You can try creating a new MC empty library and just import that single file or album to test.
I may try uninstalling BitDefender but it really bothers me that Media Center is the only program I have that seems to have a problem with BitDefender, if that is in fact the case.
Applications can't do much (if anything) to avoid interference from Antivirus tools. They're getting too aggressive and default more and more to "well it may be a virus so lets treat it like a virus even if we don't know for sure". While analyzing files, MC is reading and writing to hundreds/thousands of files which looks very much like what a ransomware or other types of virus would do. The only thing to do is to tell the antivirus to ignore all activity from the MC executable. Even so, other modules in the AV package may still interfere.