tons of blue screen of death error

if i play music online i get 2 bsod
stop 0x00000012
stop 0x000000d1

and at bootup i get
stop 0x000000c5

in the device manager under hidden devices
there a 20 !!!!!!!!!! i have not installed no new hardware
at all i have a

pc-emachines w3400
amd 64 3000+
ati radeon x1600 pro pci-e
1.55 g
sound blaster se
80g
anect 500watt
dvd_-rrw
cd drive
56k soft modem
logitech mx400 usb
ps/2 keyboard

and id like to know what is going on iv put my last dmp files in here

One of the devices connected to your PC might be responsible for this. Start by taking out the modem and checking without it. Also try the sound card.
Let us know?