[Mods, please, pin this]

Due to a bug in Malwarebytes, you may see in MBAM's log following entries:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\atapi (Rootkit)
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\atapi (Rootkit)
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\atapi (Rootkit)
DO NOT remove those entries!
If you do, your computer will become UN-bootable.
The issue has been fixed in the latest MBAM update, so, please, make sure, you update MBAM before you run it.