Error code 50, PAGE_FAULT_IN_NONPAGED_AREA - Usual causes: Defective hardware (particularly memory - but not just RAM), Faulty system service, Antivirus, Device driver, NTFS corruption, BIOS.
Error code D1, DRIVER_IRQL_NOT_LESS_OR_EQUAL - Usual causes: Device driver
Error code 24, NTFS_FILE_SYSTEM - Usual causes: Disk corruption, insufficient physical memory, Device driver, Indexing, Resident antivirus, backup, defrag programs, Disk/Drive failing/failure.
Error code 8E, KERNEL_MODE_EXCEPTION_NOT_HANDLED - Usual causes: Insufficient disk space, Device driver, Video card, BIOS, Breakpoint in startup without having a debugger attached, Hardware incompatibility, Faulty system service, 3rd party remote control, Memory.
Error code 7F, UNEXPECTED_KERNEL_MODE_TRAP - Usual causes: Memory corruption, Hardware (memory in particular), Installing a faulty or mismatched hardware (especially memory) or a failure after installing it, 3rd party firewall, Device drivers, SCSI/network/BIOS updates needed, Improperly seated cards, Incompatible storage devices, Overclocking, Virus scanner, Backup tool, Bad motherboard, Missing Service Pack.
Error code A, IRQL_NOT_LESS_OR_EQUAL - Usual causes: Kernel mode driver, System Service, BIOS, Windows, Virus scanner, Backup tool, compatibility.
Error code 19, BAD_POOL_HEADER - Usual causes: Device driver.