Dear people- still finding locks on my files and now some files cannot be save back to the original folder- the button is dimmed. Have tried Disk Utility, DW, Keychain, First Aid and a number of other utilities. There doesn't seem to be a pattern, but random. Do you think maybe a virus? Waiting to upgrade to Tiger for this reason. i'm very grateful for all the help you given, Should i go ahead and upgrade? Thanks. -chris G4 Dual 450 3 Internal 2 External drives 10.3.9