How to Fix a Missing Ntoskrnl.Exe File
The "NTOSKRNL.EXE" file plays an important role in starting up the computer. If this file is missing or corrupted, Windows will fail to boot until you replace the file. Some viruses like "w32.bolzano" and its variants infect the "NTOSKRNL.EXE" file, causing a similar problem. You must perform one or more of the possible fixes to remedy the issue so your computer can boot again.
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Instructions
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Turn on a working computer with its keyboard plugged in and test if the keyboard is working properly. If it is, shut down that computer, unplug the keyboard and plug it into the system that is suffering from the missing "NTOSKRNL.EXE" file. Turn on the system to see if the replaced keyboard resolves the problem.
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Press the "F8" key right after the system initializes the boot sequence and before the Windows logo shows up to bring up a menu of boot options. Choose the "Last Known Good Configuration" option with the arrow keys and press the "Enter" key.
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Insert your Microsoft Windows installation disc. Restart the computer and press the "R" key on your keyboard once you reach the "Microsoft Setup" menu.
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Choose the operating system that you wish to repair, type in your admin password when prompted and press the "Enter" key. Type "bootcfg /rebuild" and press the "Enter" key to rebuild the Windows "boot.ini" file, which may also resolve the issue.
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Type "chkdsk /r" and press the "Enter" key to scan the entire hard disk for errors. Type "exit" and press the "Enter" key to exit the "Recovery Console." Restart your computer and see if Windows boots properly.
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Tips & Warnings
If your computer boots correctly after performing a certain step, do not try the other steps as it wastes time.
