I think you are right, I did use AWWCleaner years ago and i may have created the folder. I will go ahead and delete the FRST folder directly from my C/ drive. I don't think it will affect my Windows 7 operating system.
I noticed that I have a folder on my C/ drive called "FRST" and I would like to know if it is used by Windows. Within the folder are three files labeled Hives, Logs and Quarantine. If anyone can answer I'd appreciate it.