Have you seen this window popup everytime when you start up your windows even you clicked “Cancel”?

Window Genuine Advantage Notifications Setup Wizard

here the way to remove it
Goto [your windows folder]\system32 and delete the folder named “KB905474”
that’s it!
if you want more clean up
click Start > Run > type: “regedit” then enter
Press F3 and find the kb905474 (remeber to highlight “My Computer” to search)
delete any key that contain KB905474\wgasetup.exe