Windows error decoder
Find the code, process or Event ID you're looking at. Each page says what it means, what usually causes it, and the fixes that work, safest first.
Explainers
Current Windows changes people are confused about, decoded.
Blue screen stop codes
What each blue screen (BSOD) stop code means and what usually causes it.
- WHEA_UNCORRECTABLE_ERROR0x00000124
- DPC_WATCHDOG_VIOLATION0x00000133
- CLOCK_WATCHDOG_TIMEOUT0x00000101
- SYSTEM_SERVICE_EXCEPTION0x0000003B
- KERNEL_SECURITY_CHECK_FAILURE0x00000139
- VIDEO_TDR_FAILURE0x00000116
- MEMORY_MANAGEMENT0x0000001A
- PAGE_FAULT_IN_NONPAGED_AREA0x00000050
- IRQL_NOT_LESS_OR_EQUAL0x0000000A
- CRITICAL_PROCESS_DIED0x000000EF
- INACCESSIBLE_BOOT_DEVICE0x0000007B
Event Viewer IDs
The Event Viewer entries people find after a crash, shutdown or failed update.
Background processes
The Task Manager processes that use too much CPU, memory or disk, and why.