The invaluable Windows System File Checker

If you’re a Windows user System File Checker is a really useful tool in your armoury . It repairs broken or missing Windows system files and often fixes obscure problems or improves Windows performance.

System File Checker run from the Windows Command Prompt
In Windows 7 or Windows Vista run the command sfc /scannow from an “elevated” Command Prompt.  For a more detailed description of System File Checker, elevated Windows Command Prompts and how to use them see this mistywindow page.

You really need System File Checker.