Correction of prev thread title. Seen several threads on this subject with kind of similar problems. Tried several fixes but no joy. Problem arises when I uninstall McAfee security center. Windows Sidebar stops working. Tried restore point and that restores everthing ok but when I try uninstalling again, same problem occurs. Tried sfc /scannow and problems cannot be fixed (http://www.vistax64.com/tutorials/66978-system-files-sfc-command.html) Tried reading CBS log (How to use the System File Checker tool to troubleshoot missing or corrupted system files on Windows Vista or on Windows 7) but cannot open CBS log file. Tried CC cleaner to fix registry but no joy there either. Any help would be really appreciated...