Encountering "Error 87: The parameter is incorrect" in Windows indicates a system, driver, or file issue interfering with application or OS functions. Resolving it often requires specific diagnostics. Compare these 4 effective tools:
1. Windows System File Checker (SFC)
Best for: Corrupted or missing protected system files.
- How: Run
sfc /scannowin Admin Command Prompt. - Pros: Built-in, essential first step.
- Cons: Limited to core OS files, may not fix all driver issues.
2. Deployment Image Servicing and Management (DISM)
Best for: Underlying Windows component store corruption (often run after SFC fails).
- How: Run
DISM /Online /Cleanup-Image /RestoreHealthin Admin Command Prompt. - Pros: Repairs the source for SFC, critical for deeper corruption.
- Cons: Requires internet connection to download repair files, slower than SFC.
3. Driver Verifier Manager (Built-in)
Best for: Isolating problematic drivers causing parameter errors.
- How: Search for "verifier", configure to check all signed drivers or specific ones.
- Pros: Excellent for pinpointing faulty kernel-mode drivers triggering Error 87.
- Cons: Can cause boot failures or instability if a critical driver is faulty; use cautiously; disable immediately after testing.
4. Specialized Third-Party System Repair Tools
Best for: Automated registry repairs, permission resets, & broad driver fixes when built-in tools fall short.
- How: Launch comprehensive scans (select reputable options).
- Pros: User-friendly, fixes registry errors/corrupt permissions often missed.
- Cons: Varying quality; select proven, trusted brands; not a replacement for SFC/DISM.
Recommended Action Plan
- Run SFC immediately after encountering the error.
- If SFC finds issues it can't fix or errors persist, run DISM.
- For suspected driver issues (especially after hardware changes/updates), use Driver Verifier cautiously for diagnosis.
- Consider a reliable third-party repair tool if registry/permission issues are suspected after initial steps.
- Always: Check Event Viewer logs for source context before repair attempts and create a System Restore Point.
