Hidden files

Logged in under my username with Admin rights on XPSP2, I cannot get the hidden files (Temp. Internet Files) to be displayed. I modified all settings so they should, and I can see them under Default User. Are there settings I’m missing? Also, If I do a Search for Temp. Internet Files, they are displayed, but I can’t change the Properties. So far taking up 10MB of space that I want to defrag.