iflesymem

I'm new here so I hope this is where I learn how to program my new toaster........or how to make vlc my default preview player instead of w.m.p. which repeatedly gives me a redundant message about being out of date and it being impossible to make it not out of date, I've gone to windows ctrl panel and made vlc my default for everything there but when I try to preview in bitcomet it just keeps opening w.m.p. with that stupid message. Any helpspeak would be full of help for me right now, I'm stuck. Thanks