Hi Wrinkledlion,
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Check if you can boot into Safe Mode.
Safe mode starts Windows with a limited set of files and drivers. Startup programs do not run in safe mode, and only the basic drivers needed to start Windows are installed.
Safe mode is useful for troubleshooting problems with programs and drivers that might not start correctly, or that might prevent Windows from starting correctly. If a problem does not reappear when you start in safe mode, you can eliminate the default settings and basic device drivers as possible causes. If a recently installed program, device, or driver prevents Windows from running correctly, you can start your computer in safe mode and then remove the program that is causing the problem.
1. Restart your computer.
Click the
Start button, click the arrow next to the
Lock button, and then click
Restart.
2. Do one of the following:
If your computer has a single operating system installed, press and hold the F8 key as your computer restarts. You need to press F8 before the Windows logo appears. If the Windows logo appears, you will need to try again by waiting until the Windows logon prompt appears, and then shutting down and restarting your computer.
If your computer has more than one operating system, use the arrow keys to highlight the operating system you want to start in safe mode, and then press F8.
3. On the
Advanced Boot Options screen, use the arrow keys to highlight the safe mode option you want, and then press ENTER. Log on to your computer with a user account that has administrator rights.
When your computer is in safe mode, you'll see the words
Safe Mode in the corners of the display. To exit safe mode, restart your computer and let Windows start normally.
For more information visit the following link:
http://windows.microsoft.com/en-US/windows7/Start-your-computer-in-safe-mode
Method 2:
If a Windows Resource Protection (WRP) file is missing or is corrupted, Windows may not behave as expected. For example, some Windows functions may not work, or Windows may crash. The System File Checker tool (SFC.exe) scans for missing or corrupted system files and repairs them.
Use the System File Checker tool (SFC.exe) to determine which file is causing the issue, and then replace the file. To do this, follow these steps:
1. 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.
2. Type the following command, and then press ENTER:
sfc /scannow
The
sfc /scannow command scans all protected system files and replaces incorrect versions with correct Microsoft versions.
Check out this link which talks about “How to use the System File Checker tool to troubleshoot missing or corrupted system files on Windows Vista or on Windows 7”
http://support.microsoft.com/kb/929833
Let me know if this helped.
Regards,
Divya R – Microsoft Support.