# prefs.js is a virus (according to F-secure)

After today's software update (Zotero 5 stand alone) prefs.js from c:\Program Files (x86)\Zotero\defaults\preferences\ is considered a virus by F-secure, thus deleted.
Funny enough: the file is still there.
But nevertheless, whatever made this watchdog bark, it would be nice if this would not happen.
• nah, that's 100% on them; their pattern matching must have gone haywire -- that's a perfectly standard file and the totality of changes for 5.0.36 was the addition of one line (that sets a preference like all other lines in that file)

`pref("extensions.zotero.fileHandler.pdf", "");`