Fix 'ffmpeg command not found' in PHP exec()
When you call exec('ffmpeg ...') in PHP and get ffmpeg command not found
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listHow to Fix Outlook Permission Denied Error
You open Outlook and see a "permission denied" error. The app may not start, or you cannot access...
Fixing 504 Gateway Timeout from Windows Update with Proxy
If you see a "504 Gateway Timeout" error when running Windows Update, and your system uses a prox...
BitLocker Network Unlock Not Working: Fixes and Checks
If your BitLocker-protected computers are prompting for a recovery key at startup instead of unlo...
Fix 'File Locked by Unknown Process' in Command Prompt
You try to delete, rename, or move a file, but Windows says it's locked by an unknown process. Th...
Fix Chrome Profile Module Not Found After Update
After a Chrome update, you might see the error "Profile module not found" or "The profile module ...
Topic paths
Quick titles
Group Policy Causing Defender Token ExpiredHow to Fix Windows Security Error Code Mac on Dual-Boot SystemsFix Firefox Not Responding by Refreshing Your ProfileReduce Outlook CPU Usage by Tweaking AntivirusResolve Windows Search Login Loop Error 0x80070520Windows Defender Service Won't Start TroubleshootingOneDrive Offline Installer Setup for Shared ComputersChrome Profile Settings Not Sticking – How to Fix