if u want sd won't start with ie then
open sd select "OnGuard" tab
then uncheck "activate onguard"
after this it will not start with ie
next do this thing
start spyware doc >setting>startup setting
as u have already mentioned that u have disabled sd
then enable it one more time, then exit sd, from taskbar as well...coz it runs in background
then open msconfig in run box
select startup
then uncheck the swdoctor item from the list, apply
restart
all done
this shud solve ur prob ,.................