This is what we call a "manual uninstall." Yes you'll run into read only files.
Bob
Hi all,
I uninstalled "Wintidy" because it wouldn't open, and when attempting to reinstall it, an error keeps coming up saying that file already exists in "Program Files". I checked and It is there, and it is "read only". Can I delete it... if the program appeared to be successfully uninstalled, why is it still in "Program Files"? (OS Vista Home Premium, 32 bit)
Thanks!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic