Learn safe Command Prompt commands for checking Windows files, networking, storage, and system information, with guidance on when to use each.
Run the appropriate built-in repair commands yourself, or use Advanced PC Repairs for a guided scan of supported Windows conditions.
Manual repair
Automatic-assisted option
Run a guided scan for supported Windows conditions without choosing command-line repairs yourself.
Command Prompt and Windows Terminal can collect useful evidence and run supported repairs. The safest workflow is to understand each command, record its result, and avoid scripts copied from unknown sources—especially commands that delete files, alter partitions, or weaken security.
Run sfc /scannow in an administrator terminal to verify protected Windows files. If SFC cannot repair them, run DISM /Online /Cleanup-Image /RestoreHealth, then run SFC again.
Use ipconfig /all to view adapters, addresses, gateways, and DNS servers. Use ipconfig /flushdns only when testing a suspected local DNS-cache issue; it does not repair an internet outage.
Use nslookup example.com to query DNS and ping for a basic reachability test. Some servers block ping, so a timeout alone does not prove the site is offline.
Use tasklist to list processes and driverquery for installed driver information. Do not terminate an unfamiliar process until you identify its publisher and purpose.
Run chkdsk C: /scan for an online check. Repair switches may schedule work at restart and can stress a failing drive, so back up important data before repair operations.
Append > report.txt to save ordinary output to a file you control. Do not share reports publicly without reviewing them for usernames, network addresses, and device details.
Only when the command requires elevation. Use a standard terminal for read-only checks when possible.
Not automatically. Read every command and avoid scripts that disable security, delete broad folders, or change boot records without a clear need.
When the component store may be damaged, run DISM first and SFC afterward.
This article provides general educational information. Menus and options vary by Windows version, computer manufacturer, and configuration.
If Windows can start normally or in Safe Mode, download Advanced PC Repairs to scan for supported Windows conditions that may contribute to errors, instability, or reduced performance.
Software installation is required. Scanning is free. Optional paid repairs or subscription plans are presented with pricing and renewal terms before purchase.