Any idea what that cryptic hex (i assume) string is? Is it MS's way of telling us they are the high priests of computing?

If they were, a mere 42 would have been perfectly sufficient. But they botched that up: the tally is only 41 ...

sub sumit {
        my $sum = 0;
        map { $sum += $_ } split //, @_ ? $_[0] : $_;
        $sum
}

my @sums = map { sumit } map { sumit hex } split /\-/, '86C86720-42A0-
+1069-A2E8-08002B30309D';
print sprintf "%s\n", join '+', @sums;
[download]

bw, bliako