Medium Software ✓ Solution Verified by Community (1+ upvotes)

How to fix error unknown-crash in Windows Media Player Legacy

Error code UNKNOWN_CRASH — community-reported fix.

✅ 85% success rate
👥 1+ users verified
📅 Updated: 2026-08-12
⏱️ 10 min read
Fix based on community reports and expert analysis. Last verified: 2026-08-12 · How we verify fixes
Error Codeunknown-crash
Affected SystemWindows Media Player Legacy (—)
DifficultyMedium
Estimated Time10 min

Solution Steps

  1. 1 Close Windows Media Player completely.
  2. 2 Copy all .wmdb files from %LOCALAPPDATA%\Microsoft\Media Player to an external folder.
  3. 3 Rename CurrentDatabase_400.wmdb to CurrentDatabase_400.wmdb.bak.
  4. 4 Open Windows Media Player to regenerate the database.
  5. 5 Close Windows Media Player completely.
  6. 6 Delete all .wmdb files in %LOCALAPPDATA%\Microsoft\Media Player, including the new CurrentDatabase_400.wmdb and the .bak file.
  7. 7 Replace the deleted .wmdb files with the copies from step 2.
  8. 8 Reopen Windows Media Player.

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