I just updated the A1 Click with the most recent update. I am running Win Vista SP1 and the cleaner does not seem to work. It used to scroll through the files now it just look froze and it say wait scanning. I left it run for about an hour and it does not change I can stop the scan with the button but I don't know it it is doing anything. When I stop it does go to the last screen that says how many files to clean but I have to stop it manually. How long should a scan take? I may not leave it run long enought to finish on its own, I just don't know. It does not act like the previous version. I am using registered version 1.01.59 6/20/08.