What does that error code mean?
Type the code or message exactly as it appears on your screen. You will get what it means in plain English, whether it is serious, and one safe, numbered fix — free, with no download and no one to call.
Try 0x80070002, 0x80070005, or CRITICAL_PROCESS_DIED.
Start with what you are seeing
- Windows Error CodesLook up any code — what it means and the safe fix, for Windows 10 and 11.
- Windows Update ProblemsUpdates stuck, failed, undoing changes, or a PC that slowed down right after one.
- PC Won't Start & BitLockerYour PC will not start, loops through Automatic Repair, or asks for a 48-digit recovery key.
- Is This Microsoft Message Real?Fake virus warnings, “call support” pop-ups, and real Defender alerts — told apart, in plain English.
- Locked Out & Account RecoveryLocked Microsoft account, code not arriving, forgotten PIN, old Hotmail — getting back in, step by step.
Most-searched error codes
| Code | What it means, in one line | First safe step |
|---|---|---|
0x80070002 | Windows could not find a file it needed — usually during an update. | Restart once, retry the update. |
0x80070005 | “Access denied” — a permission is blocking the install or update. | Sign in as administrator, retry. |
0x80073712 | Some Windows update files are damaged and need repair. | Run the Update troubleshooter. |
0x80004005 | Microsoft's “unspecified error” — the fix depends on where it appeared. | Note where it appeared first. |
0xc000021a | A critical Windows process stopped while your PC was starting or signing in. | Boot to the recovery menu. |
How this site works
Every fix is checked against Microsoft Learn and Support pages, dated, and re-checked after major updates. We never sell the fix: no downloads, no registry cleaners, no driver updaters, no paid support, and never a phone number to call. Every page is print-friendly, so you can read the steps away from the screen. More on How We Verify and About.