UCM-UCSI ACPI, Windows has stopped this device because it has reported problems (Code 43). What is UCM-UCSI ACPI Device Driver?

Fix error Windows has stopped this device because it has reported problems (Error Code 43), for devices for Intel, Radeon or AMD Cards.

Went back to code 43, had to wipe drivers, got it back, underclocked further, still crashed. - Nuke and pave Windows 8 install, stock drivers: it boots up without a code 43, but it did crash again ...