Hi Lindsay2367,
Looks like some files are missing or corrupted. You can try running the System File Checker and letting us know the results, this will scan protected system files and replace incorrect versions, with the correct Microsoft versions of the files.
i. Open an elevated command prompt. To do this, click Start, click All Programs, click Accessories,
right-click Command Prompt, and then click Run as administrator. If you are prompted for an administrator password or for a confirmation, type the password, or click Allow.
ii. Type the following command, and then press ENTER: sfc /scannow
Check the article http://support.microsoft.com/kb/929833 “How to use the System File Checker tool to troubleshoot missing or corrupted system files on Windows Vista or on Windows 7”
Diana
Microsoft Answers Support Engineer
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