Windows & Office Error Code Lookup
Search by error code (like 0x80070005), stop code name (like IRQL_NOT_LESS_OR_EQUAL), Excel formula error (like #REF!), or plain description.
Don't have an exact code yet? See common Windows error messages explained in plain English first.
11 results
0X80070005 — Access Denied
A permissions problem — the current user account doesn't have rights to the file, folder, or action being attempted.
0XC0000022 — STATUS_ACCESS_DENIED
A related but technically distinct code from the more common 0x80070005 — this is the NTSTATUS-style access-denied error, most often seen when a program can't open a file, DLL, or registry key it needs at startup, or when Windows activation specifically fails because the Software Protection Service can't start.
0X8007000E — Not Enough Storage / Out of Memory
Despite the wording, this is usually about low disk space rather than RAM — an operation ran out of room to complete.
0XC0000005 — Access Violation (STATUS_ACCESS_VIOLATION)
A program tried to read or write memory it wasn't allowed to — usually an app bug, but can indicate corrupted files or faulty RAM if it happens across many different apps.
0XC000021A — STATUS_SYSTEM_PROCESS_TERMINATED
A critical system process (like winlogon.exe or csrss.exe) crashed, usually kicking you to a blue or black screen with this message.
0X80004005 — Unspecified Error
A catch-all error code that different apps and Windows components use for many different underlying problems — context matters more than the code itself here.
0X8007045D — The Request Could Not Be Performed Because of an I/O Device Error
Windows failed to read or write to a drive — often points to a failing disk, a bad USB cable/port, or a scratched optical disc.
0X80073CF9 — Microsoft Store App Package Failed
A Microsoft Store app's installation package is corrupted or a dependency is missing.
0X8007007E — The Specified Module Could Not Be Found
A required system or app component (DLL) is missing or wasn't registered correctly.
0XC0000034 — STATUS_OBJECT_NAME_NOT_FOUND (Boot Error)
Windows can't find a file it needs during startup, often after an interrupted update installation.
RESET-PC-NO-CHANGES-MADE — "There Was a Problem Resetting Your PC — No Changes Were Made"
Windows started the Reset this PC process but couldn't complete it, most often due to corrupted system files, a conflicting Windows Store app, low disk space, or a disabled/corrupted Windows Recovery Environment (WinRE) — and rolled back without changing anything, hence "no changes were made."