suddenly got error code 0xc000012f

Question

suddenly got error code 0xc000012f when trying to open word (worked last night, not today; I made no changes)

Answer 1

Hi Robert Jewell, thanks for posting. If Word suddenly throws error code 0xc000012f, it usually means a corrupted DLL or a broken Visual C++ runtime.

First, try repairing Office:

• Go to Control Panel > Programs > Programs and Features
• Find Microsoft Office, right-click, and choose Change
• Select Quick Repair, then try Online Repair if needed

Second, reinstall Visual C++ Redistributables:

• Download both x86 and x64 versions from Microsoft’s official page
• Install them and restart your PC

Third, run a system scan:

• Open Command Prompt as Administrator
• Type:

cmd

sfc /scannow

• Wait for the scan to complete and restart your PC

Lastly, check for Windows Updates and install any pending patches, especially related to .NET or system libraries.

Let us know how it goes. If this helps, feel free to mark the answer as accepted so others can find it too.

Best,
Carl