Hello,this infection deletes a core executable of Malwarebytes' we will need to download a new copy of it.
Follow the steps in the Automated Removal Instructions for Internet Security 2010
from the guide hereRemove Internet Security 2010 (Uninstall Guide)
This should allow you to run MBAM..
Then post the scan log here.
As mentioned by whiteac2k4 above ...
Manually Downloading Updates:
Manually download them from HERE
and just double-click on mbam-rules.exe
to install. Alternatively, you can update through MBAM's interface from a clean computer, copy the definitions (rules.ref) located in C:\Documents and Settings\All Users\Application Data\Malwarebytes\Malwarebytes' Anti-Malware from that system to a usb stick or CD and then copy it to the infected machine.