“If you receive Windows Update error FFFFFFFE, it means that an update can’t be installed because of a problem on your computer.
This problem is usually caused by a malware (malicious software) infection. To prevent your computer from becoming unstable, Windows won’t install the update.
To solve this problem, we recommend that your reinstall Windows 7 using the Custom installation option and format the hard disk. Make sure to back up your files before you reinstall Windows 7. After the installation is complete, you can restore your files and install or reinstall an antivirus program.” read more…
“If you receive Windows Update error 84C40007, it means that an update to SQL Server 2008 can’t be installed because of a problem with a .NET Framework installation.
This error occurs when installing SQL Server 2008 Service Pack 2 (SP2) on a computer with Microsoft .NET Framework 4 Client Profile already installed. Microsoft .NET Framework 4 Client Profile doesn’t contain the complete set of .NET Framework libraries needed to complete the installation.
To solve this problem, you need to install the full Microsoft .NET Framework 4 package. For installation instructions, go to the Microsoft Download Center on the Microsoft website.”