am I infected?

Hi its been 3 days since my first post, could someone please check my logs for me.

viewtopic.php?f=11&t=56203

thanks

I've got some more information. We cannot backup our system, the message that keeps appearing when we try says the following:
' An error occurred, the following information might help you resolve this error.

The backup location cannot be found or is not valid. Review your backup settings and check your hardware configuration (0x81000006)

I've answered your log topic, please post any replies there.