There's a program called called Pest Patrol, which has the detection portion free, but charges for the remover. It seems to be very thorough, and if you're patient you can get a log of all it finds in the free version, and then delete the files manually. It gives you all the directory paths and registry keys, and even includes malicious cookies. It might take several boots to do this with spyware that continually tries to reload, since Windoze won't delete a file that's in use.
It's been a while since I needed it, but as I recall, you can tell the program to save a log, and then you can find that file and print it out as a plaint text file. If you try to get it to print the list directly, you'll get a million pages of formatted, colored html.
I haven't checked recently for new versions of PP, but it's worth a try, and if you're not really comfortable hacking at the registry, it's probably worth the price to buy the remover if the detector finds what you're looking for.