Constantly Getting BSODs With Different Error Codes

[avrona]

Over the last few days I've been getting BSODs rather often, weird thing is though it's a different error code almost every time. So far I've had DPC_WATCHDOG_VIOLATION, SYSTEM_SERVICE_EXCEPTION, and IRQL_NOT_LESS_OR_EQUAL, each several times. Any ideas on what to do? And yes I did already do sfc /scannow, done all Windows updates and ran a memtest.