I have windows 8 on my laptop, I don't use the laptop its just a spare computer should my main one fail. After installation I don't think I installed anything besides Edge and a cd burner. Within the windows folder however there are a few folders that contain about 25gb or more of data. Prefetch has virtually nothing in it, Crap Cleaner and the normal windows disk clean up don't do much. I am confused as to why there is so much data being used, system restore function is disabled. Where should I look to see why there is so much data in there? Thanks in advance.