Hi i cannot roll back to Internet Exployer 8 or get this update for exployer 9 on my pc? Please help this has never happend before and I have tried all the Microsoft free solutions.

Go to run and type in SFC /Scannow and see what happens. Just copy and paste the command.

Hi, Which fixit have you tried? Follow the methods mentioned below and check. Method 1: Troubleshoot problems when you cannot install Internet Explorer 9 http://support.microsoft.com/kb/2409098 Try to install Internet Explorer 9 manually and check. http://www.microsoft.com/download/en/details.aspx?id=23332 Method 2: Run the Windows Update troubleshooter. Open the Windows Update troubleshooter http://windows.microsoft.com/en-US/windows7/Open-the-Windows-Update-troubleshooter Method 3: You may perform a clean boot and check if you are able to turn the firewall on. To help troubleshoot error messages and other issues, you can start Windows Vista or Windows 7 by using a minimal set of drivers and startup programs. This kind of startup is known as a "clean boot." A clean boot helps eliminate software conflicts. How to troubleshoot a problem by performing a clean boot in Windows Vista or in Windows 7 http://support.microsoft.com/kb/929135 Please note: After the troubleshooting, make sure to boot your computer to normal mode. You may also refer to the link provided below for more information. Unable to install updates in Windows Vista, Windows 7, Windows Server 2008 and Windows Server 2008 R2; http://support.microsoft.com/kb/2509997Your Name TechNet Community Support