There are so many of these progs around. I have tried a couple - currently have System Cleaner installed, and CCcleaner in the past. Several before that. I am running Japanese XP Pro and when I used the registry cleaner with Ccleaner I had all sorts of problems. I ended up having to do a restore from Acrosis. I am wondering whether any of the specialists amongst you could suggest a prog that is very, very good for cleaning my registry? Thanks.