Runtime errors: the index

Every runtime error covered here, grouped the way people meet them: inside Excel macros, in Windows program dialogs, and in the older software that still runs small businesses. Each page gives the plain-English meaning, the real causes in order, and fix steps that were checked before publishing.

Excel & VBA errors

Runtime Error 1004 — Application-defined or object-defined error — Excel VBA's catch-all
Runtime Error 91 — Object variable or With block variable not set
Runtime Error 13 — Type mismatch
Runtime Error 9 — Subscript out of range
Runtime Error 429 — ActiveX component can't create object
Runtime Error 53 — File not found
Runtime Error 76 — Path not found
Runtime Error 424 — Object required

Windows & Visual C++ errors

Visual C++ Runtime Library error — The umbrella dialog, explained
“Has requested the Runtime to terminate it in an unusual way” — The exact sentence, answered
Runtime Error 6025 (R6025) — Pure virtual function call
Runtime Error atibtmon.exe — AMD brightness utility crash
Runtime Error 217 — Legacy app error at start/shutdown
Runtime Error 216 — Legacy access violation

Legacy VB & Java errors

Runtime Error 339 — Component not correctly registered
Runtime Error 380 — Invalid property value
Runtime Error 70 — Permission denied
Runtime Error 5 — Invalid procedure call or argument
“A JNI error has occurred” — Java version mismatch (Minecraft)

Scam alerts & fake warnings

Tech support scam pop-up — "Call Microsoft, your computer is infected" — always fake; safe exit + recovery
Fake "Windows Defender Security Warning" — The blocked-PC alert with a phone number
Error #268D3 — The invented Microsoft code on scam pages
"Windows detected ZEUS virus" — The loud "do not shut down" scareware page
Fake blue screen with a phone number — A web page imitating a crash
Fake renewal email (Norton / McAfee / Geek Squad) — The "call to cancel" refund scam
Clicked a phishing link? — The six things to do, in order
Fake Apple security warning — Mac and iPhone Safari pop-ups
"Your computer has been locked" — The FBI/police fine screen
Social Security scam calls — "Your SSN has been suspended" is fake
Fake Amazon account alerts — Locked-account and mystery-order texts
Someone has remote access to my computer — Cut it off and lock down, step by step

One rule on this site: no page here recommends downloading a “fixer,” a registry cleaner, or a driver updater. Fixes come from settings, the software's own installer, or Microsoft — and the source is named.