How to Detect Missing System Files
Microsoft Windows 7, like all previous incarnations of Windows, runs by accessing a group of core files. If these files are missing or corrupted, serious system-wide glitches will occur. The culmination of these glitches and malfunctions will eventually be the refusal of the operating system to load. Windows, like any operating system, may or may not be capable of detecting these missing files before a catastrophic crash occurs. Corruption of these system files can occur via attack from a computer virus, but can also occur because the user has inadvertently deleted them. Fortunately, restoring missing system files is a straightforward process.
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Instructions
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Place the Windows 7 installation disk into the disk drive.
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Click "Start" and then click "Computer." Confirm that the disk drive is correctly reading the Windows 7 installation DVD by looking at the section that is named "Devices with Removable Storage." There should be an icon showing a blue DVD box with the Windows logo on it.
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Close the "Computer" window. Click "Start" and then click "Restart."
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Press "Enter" when you receive the message, "Press any key to boot from CD or DVD."
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Wait for setup to initialize. This can take anywhere from two to five minutes.
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Click the drop-down menu to choose your language and then click "Next."
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Click "Repair Your Computer."
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Choose the installation of Windows for which you are searching for missing system files by clicking on it. Otherwise, click "Next."
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Click "Startup Repair."
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Tips & Warnings
The best time to attempt to replace missing system files is before Windows refuses to load, as shown. However, if Windows will not load, simply insert the Windows installation DVD and reboot the computer.
Never delete files located within the "Windows32" folder or from any other folder if you suspect that they are Microsoft Windows system files.
