Hi, Those 'Registry Fix' programs do not FIX anything and most often cause serious issues so it is best to totally avoid those. If you see a Registry Cleaner program claiming to fix a host of serious issues just leave it alone as that is a warning it is totally bogus. ----------------------------------------------------- References to Vista also apply to Windows 7. What antivirus/antispyware/security products do you have on machine?

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Include any you have EVER had on this machine including those you uninstalled (they leave remnants behind which can cause strange issues). ---------------------------------------------------- Do these: Try these to clear corruption and repair/replace damaged/missing system files. Start - type this in Search Box ->COMMAND find at top and RIGHT CLICK - RUN AS ADMIN Enter this at the prompt - sfc /scannow How to Repair Windows 7 System Files with System File Checker How to analyze the log file entries that the Microsoft Windows Resource Checker (SFC.exe) program generates in Windows Vista cbs.log Also run CheckDisk so we can rule out corruption as much as possible.