I have Windows Vista Home Premium SP1 on almost new Gateway computer. Everything was okay until recently. Now, I can't move .mov files from one folder to another. If I uninstall Quicktime, I can move the files. If I reinstall Quicktime, I can't move .mov files. I have user access control turned off. I am signed in as administrator. I have tried more than one version of Quicktime with no luck and it's making me crazy. Any ideas?