Networking
ipconfig /all
Displays full TCP/IP configuration for all adapters, including MAC address and DHCP info.
ping 8.8.8.8
Tests connectivity to a specific IP address or domain to check for packet loss.
tracert google.com
Traces the route packets take to a destination, identifying network hops and delays.
netstat -an
Shows active network connections and listening ports. Useful for finding unusual connections.
ipconfig /flushdns
Clears the local DNS resolver cache. Use this if websites aren't resolving correctly.
ipconfig /renew
Releases and renews the IP address from the DHCP server. Good for connection issues.
System File & Health
sfc /scannow
System File Checker. Scans and repairs corrupted or missing protected Windows system files.
DISM /Online /Cleanup-Image /RestoreHealth
Repairs the underlying Windows component store, which `sfc` relies on. Run this if `sfc` fails.
chkdsk /f /r C:
Checks a disk for file system errors (/f) and locates bad sectors to recover data (/r).
resmon
Opens the Resource Monitor, providing a detailed real-time view of CPU, memory, disk, and network usage.
shutdown /r /o /t 0
Restarts the PC into the Advanced Startup Options menu for Safe Mode, System Restore, etc.
System Information
systeminfo
Displays a detailed configuration summary of the computer's hardware and software.
msinfo32
Opens the System Information GUI, a comprehensive tool for viewing hardware, components, and software.
dxdiag
DirectX Diagnostic Tool. Gathers information about DirectX components and drivers for multimedia troubleshooting.
Process & Service Management
tasklist
Displays a list of currently running processes on the local or a remote machine.
taskkill /F /PID 1234
Forcefully terminates a process by its Process ID (PID). Use `tasklist` to find the PID.
services.msc
Opens the Services management console to start, stop, and configure Windows services.
gpupdate /force
Forces an immediate update and reapplication of all Group Policy settings.
Get-Process | Sort CPU -Desc | Select -First 10
PowerShell: Lists the top 10 processes by CPU usage. (Run in PowerShell, not CMD).
Get-Service | ? { $_.Status -eq "Running" }
PowerShell: Lists all currently running services. (Run in PowerShell, not CMD).
Disk & Storage Management
diskmgmt.msc
Opens the Disk Management GUI to manage partitions, format drives, and assign drive letters.
diskpart
Opens the command-line disk partitioning utility. (Advanced users only).
cleanmgr
Opens the Disk Cleanup utility to free up space by removing temporary files.
dfrgui
Opens the Drive Optimizer to defragment HDDs or optimize (TRIM) SSDs.
Useful Utilities & Applets
eventvwr.msc
Opens the Event Viewer, which shows a log of system and application errors and events.
msconfig
Opens System Configuration to manage boot options, services, and startup programs (pre-Win10).
control
Opens the classic Control Panel.
appwiz.cpl
Opens "Programs and Features" to quickly uninstall applications.
perfmon
Opens the Performance Monitor to analyze system performance and resource usage in detail.
mstsc
Opens the Remote Desktop Connection client.