l use Winpatrol, it's brilliant, not only does it show startup files, but it explains what the file is, and wether it's safe to remove.
only prob is l had to buy Winpatrol pro for about $10. but i've used it for the last three years and it's been worth every penny/cent.
l't explains what every file is, and does. it's a bit of a drag going through cookies, but if there is anything hiding in there you will find it