Message when trying to update=!!!bad checksum!

[daisy15]

Can someone please tell me what !!!bad checksum! means?

Thank you

 

[Zenobia]

Please see here for an explanation about bad checksum:
http://www.spybot.info/en/faq/20.html
And,have a look here:
http://forums.spybot.info/showpost.php?p=46146&postcount=2