πŸ› οΈ Core Windows Troubleshooting Commands
πŸ” System File & OS Repair
  • sfc /scannow
    Scans and repairs corrupted system files.
  • DISM /Online /Cleanup-Image /RestoreHealth
    Fixes deeper Windows image issues (use if SFC fails).
  • chkdsk C: /f /r
    Checks disk for errors and bad sectors.
🌐 Network Troubleshooting
  • ipconfig /all
    Check IP, DNS, gateway details.
  • ipconfig /release + ipconfig /renew
    Refresh IP address.
  • ipconfig /flushdns
    Fix DNS-related issues (websites not loading).
  • ping google.com
    Test internet connectivity.
  • tracert google.com
    Identify where connection is failing.
  • netsh winsock reset
    Fix network stack corruption.
  • netsh int ip reset
    Reset TCP/IP configuration.
πŸ”Œ Network Ports & Connections
  • netstat -ano
    Shows active connections and process IDs.
  • tasklist | findstr <PID>
    Identify which program is using a port.
βš™οΈ Process & Performance
  • tasklist
    Shows running processes.
  • taskkill /PID <pid> /F
    Force-stop a process.
  • perfmon
    Opens Performance Monitor.
  • resmon
    Opens Resource Monitor (great for CPU, RAM, disk usage).
🧠 Memory & Hardware
  • mdsched.exe
    Windows Memory Diagnostic tool.
  • wmic diskdrive get status
    Quick disk health check.
🧾 Event Logs & System Info
  • eventvwr
    Opens Event Viewer (critical for diagnosing crashes).
  • systeminfo
    Full system configuration details.
  • msinfo32
    Detailed system information GUI.
πŸ” User & Permissions Issues
  • whoami
    Shows current user.
  • net user
    Manage user accounts.
⚑ Quick Troubleshooting Workflows
🚫 No Internet
  1. ipconfig /all β†’ check IP
  2. ping 8.8.8.8 β†’ test connectivity
  3. ping google.com β†’ test DNS
  4. ipconfig /flushdns
  5. netsh winsock reset
  6. Restart PC
🐌 Slow System
  1. tasklist or resmon β†’ find heavy processes
  2. sfc /scannow
  3. chkdsk C: /f
  4. Check startup apps (msconfig)
πŸ’₯ Crashes / Errors
  1. eventvwr β†’ check logs
  2. sfc /scannow
  3. DISM /RestoreHealth
πŸ’Ύ Disk Problems
  1. chkdsk C: /f /r
  2. wmic diskdrive get status
🧰 Pro Tips
  • Always run Command Prompt as Administrator for repair commands.
  • Combine tools:
    • netstat -ano + taskkill = kill suspicious connections
  • Restart after major fixes like netsh reset or DISM.