philpotrebel 0 Light Poster

i have just built a new computer and it has a soyo K7ADA mb and a maxtor 40gig HD 256mb ram amd athalon XP 2000+ onboard sound and a pny vetro gforce 4 mmx 440 vid card 400 watt smart blue power supply and an antec case windows XP professional.
well any way every time a put in new hardware and start it up it says HARDWARE MALFUNCTION NOTIFY YOUR HARDWARE VENDOR
and we all know that souldnt happen so if anyone has any advice i could use.