I found the Unlocker and succesfully deleted the locked folders and files, thank to you all. I tried to reinstall SAV10.1.9 again, but when I select and add the computer name for installation the message popped up "network name not found", problem remained. Is this installation procedure applicable for windows server 2003 ? should I install SSC before SAV or after. I can force installation locally, but SSC won't find the server group, won't load add-ins. Itried with both version 10.1.8 and 10.1.9. both have the same result.