BSOD three times a month or so

[bnstr]

My 2 yr old pc experiencing bsod about 3x a week this month, plss help

proc: amd athlon II X4 635 (quad)
os: win xp pro
memory: 2 gb
video: NVDIA Geforece GT 220 (1gb)

 

[Tmagic650]

An Nvidia video driver is causing this...