CMOS virus
Updated: 04/26/2017 by Computer Hope
A CMOS virus is a computer virus capable of infecting and modifying the CMOS (complementary metal-oxide semiconductor). They are particularly problematic because even when a computer hard drive or SSD (solid-state drive) is erased, the infection may persist, spreading to the operating system once it's reinstalled.
A good example of a CMOS virus is AntiCMOS, which could erase or reset CMOS settings.