pen sensitivity?

hello again =D

my pen for my wacom is acting funny. it just started today, after i installed updates for windows like the computer suggested.

it shakes like i am 90yrs old!

should i update drivers again? i used to have a program, the disks that came with it i cant find. i lost em =( i think it was called sensitivia but i cant find that on search in google.

its making me angry cuz everything looks squiggly! =/

anyone know?