I just finished my new build (finally) and want to use my saved ranked up profiles. I have never done this before. I have Windows 7 Home Premium. Thanks!  

Steam version or CD, not sure if there is a difference. Make sure in windows you "show all folders".
Click start button, click on your name.
app data then local then activision.
codwaw then players then profiles...it goes in there.
Hope this helps.
Happy

This is for steam version as that is what I have.

I have the  CD version.

Bolt - get ahold of me and I can help you with that . It must be done in the proper sequence or you will lose your profile .