#! perl -slw
use strict;
use constant {
    MSEpoch_2_UnixEpoch => 116444736000000000, ## corrected
};

my $in = '0x50c2b17c7c04c9014c69ac817f04c90176b7ed3581f7ca01ee1183dedea3c901';

my @hexTimes = unpack 'xx(A16)4', $in;
my @binTimes = map{ unpack 'Q', pack 'H16', $_ } @hexTimes;
my @unixTimes = map{ ( $_ - MSEpoch_2_UnixEpoch ) /1e7 } @binTimes;

print scalar localtime( $_ ) for @unixTimes;

__END__
[13:52:05.69]C:\test>845551.pl
Fri Aug 22 17:28:27 2008
Fri Aug 22 17:50:03 2008
Wed May 19 18:29:26 2010
Fri Mar 13 13:23:16 2009