BSOD or blue screen of death is the time when you will see that the screen of the computer has turned blue. The screen will display an error message at this point. Instances when the system might show ntoskrnl.exe is missing have been explained as follows.
Issue while browsing the internet:
The issue of BSOD may appear while you are browsing the internet. This issue may arise within sometime of browsing. This issue might show the term 'Unexpected_Kernel_Mode_Trap'. If you use the application blue screen viewer, it may show the driver that is responsible for the crash. It may show that this BSOD has been caused because ntoskrnl.exe is missing from the system. This issue might occur when the file netio.sys is corrupted. This sort of issue can take place on a Windows 8.1 system. You may try to solve this using SFC scan by pressing the Windows key and R together, but the issue might not be solved.
Issue after reformatting:
You may have reformatted the Windows 7 Ultimate 64 bit operating system recently. It is after this that you may find the occurrence of BSOD. You may encounter the issue of BSOD every time you boot down the system or restart windows. This BSOD might show you 'driver_state_power_failure' along with the error code 0x09f. The issue might state that ntoskrnl.exe is missing. This issue might occur due to some software conflicts. You may try to check this by clean booting the system. Clean booting ensures that there are no software conflicts.
Issue after upgrading:
BSOD can occur after you have conducted an upgrade of the operating system. Soon after the upgrade to Windows 10 from Windows 7, you may see that while the system is waking from sleep mode, the system is showing the Kernel_data_inpage_error. It may show the code 0x00000154 or 0x0000007a. This issue might happen when the system is missing ntoskrnl.exe. When some drivers are not installed properly, such an issue can take place.
What can be the fix for such issues?
The issue of BSOD can take place due to a variety of reasons. Therefore, when the file ntoskrnl is missing from the system, you must use the DLL Suite. This tool can be easily used to replace missing and corrupted dll files. This tool is also useful in reactivating dll registry keys.