When performing a search for any file without a .tib extension, Windows Explorer would sometimes freeze the search process and display and error message as shown below which was difficult to close. I found a solution. Archive Open Error, Plug-in is not found (0x1B0003) token = "PlaceBrowser" Tag - 0xAC6EA1C1803F7BRC This problem is on the internet in many countries and discussed extensively in Wilders Security Forums. I resolved this problem on my PC which is running WinXp Pro and Acronis True Image 10 build 4940. I turned to My Computer, high lighted the DRIVE letter which contains a subfolder housing the ATI backup .tib file, opened Properties for the Drive, unchecked the permission to "Allow Indexing Service to index the hard drive for fast file searching." On the ensuing pop-up I selected the option to apply to all folders and files on the entire Drive. The uninstall took some time and once finished I reversed the process and reinstalled the permission to the entire drive and all folders and sub folders. There was no change in the error message until I REBOOTED. also, to reduce the extraordinary length of time required for searches in Explorer when it encountered the .tib backup I high lited the folder containing the ATI backup file and removed the Indexing Service permission for that specific folder and all files and subfolders therein.