I have a Dell laptop running Windows 7. When I opened the laptop to use, Windows began to restart but it went to a Startup Recovery process. When the scan finished, it said that ntoskrnl was corrupted. Internet search recommended that I boot from system recovery cd and copy the file from there but this does not work with Windows 7. Only options are to run Startup recovery or recover from last checkpoint (do not have one).
What can I do to recover this file?