The only threat it *might* miss would be a dormant/inactive threat that is not actively running/installed on a secondary drive, however if the threat were executed then Malwarebytes should detect it. This also means that if a threat were active from a non-standard location, because Malwarebytes checks all threads and processes in memory, it should still be detected.
Avast rootkit fullscan install#
Malwarebytes is also designed to look in all the locations where malware is known to install itself/hide, so a full or custom scan shouldn't be necessary, especially on any sort of frequent basis (like daily), especially since the default Threat Scan/Quick Scan checks all loading points/startup locations, the registry, all running processes and threads in memory, along with all system folders, program folders and data folders as well as any installed browsers, caches and temp locations. Malwarebytes is not designed to function like normal AV scanners and uses a new kind of scan engine that relies mostly on heuristics detection techniques rather than traditional threat signatures.
![avast rootkit fullscan avast rootkit fullscan](https://sm.pcmag.com/t/pcmag_uk/photo/a/avast-free/avast-free-antivirus-7-scan-choices_jt66.1024.jpg)
![avast rootkit fullscan avast rootkit fullscan](https://i.imgur.com/L7npDUr.png)
Deep scan (threat scan with scan for rootkits enabled) takes 14-18 hours to complete – threat scan is fine.Deep scan (threat scan with scan for rootkits enabled) takes 14-18 hours to complete – threat scan is fine.