Meteo Xavier

your system restore things are probably infected as well.

if you're downloading mbam through your infected computer, i'll bet it's hijacking the dls with something else. there's literally no way that mbam can be eaten in safe mode - there isn't a way for it to run without you allowing it to. download the program at work, install it in safe mode, boot, run it while watching process explorer for any suspicious threads (aka programs that run instead of mbam when you boot it). if you see them, write down the name, manually delete the files that are running (as long as it's not like system32 or something), and try, try again.