To reiterate, need to capture the error code, then google. With so many variables/components/software involved in pc diagnostics, need to narrow the field of potential sources.
1. BSODs are typically from cpu, memory, mobo fsb relationships (overclocking, incompatibility, etc.)
2. Frozen screen and/or stuttering is from graphic cards/drivers.
3. Memory issues will typically show up right away and prevent you from exiting bios.
The above is what i've experienced in BSODs, usually from overclocking all of the items in 1.
The fix for this is reseting the bios. Have you done this
Load 'fail safe defaults', something along that line depending on your bios manufacturer.