unknown files in C:\

hey guys,

A Keep-The-Computer-Efficient-And-Clean fit overpowered me today so I was browsing through some of my files. In my C:\ drive, there are some wierd files I didnt recognize:

hook.log
sccfg.sys
setup.iss


I have no idea what these files are but I googled all of them, and one of the search results for sccfg.sys starts explaining about Rootkit Revealer or something. Searched at Wilders too, no results. Not many people have these wierd files sitting there?

cheers!