Bsod on xp - no clue as to what is causing it

Hi i just recently built a new pc everything was working fine up until i installed a webcam + driver , then the BSOD error started - They happen only when the desktop icons are loading after a few boots the system succesfully makes it through the icon loading and i can play games an so what eva no problems after that and no BSOD when its working ever, until i reboot again and then the BSOD appears and i reboot couple of times and it makes it through

this is the error message

PAGE_FAULT_IN_NONPAGED_AREA

0x00000050 (0xAD6D80F0, 0x00000000, 0x8052A8D8, 0x0000000)

thats what i see on the blue screen i have tested the ram each with each slot same problem still occurs have also removed graphics card and run it on intergrated graphics problem still occures and yes i have removed the webcam drivers and it from device manager, have also cleaned the registry countless times

BTW im running winXP SP2