The 0xc00000e9 error usually appears during Windows boot due to hardware connection issues, corrupted system files, or disk read/write errors. To fix it, start by disconnecting all external devices such as USB drives, printers, or external hard disks, then restart the system. Loose or faulty SATA cables can also cause this error, so check internal hard drive connections carefully. If the issue continues, boot your PC using Windows installation media and select Startup Repair from Advanced Options. Running commands like CHKDSK and SFC can help repair disk and system file corruption. In severe cases, boot file damage may make data inaccessible. Before reinstalling Windows, it’s recommended to recover important files using Aryson Windows Data Recovery Software, which can restore deleted or inaccessible data from HDDs, SSDs, USB drives, and memory cards. After data recovery, updating drivers or reinstalling Windows can permanently resolve the 0xc00000e9 boot error.