Command Prompt fixes

Copy-ready CMD repair paths with safety notes.

Name: DR FRED Computer Solutions
Price range: $$

Use Command Prompt when Windows needs direct repair: system file checks, disk scans, DNS/IP resets, update service reset, and boot recovery.

Before you run commands

Back up important files when Windows still opens.
Connect the charger.
Use an administrator Command Prompt.
Read the note under each command before pressing Enter.

Open admin CMD

Press Start.
Type cmd.
Right-click Command Prompt.
Select Run as administrator.

System repair

Repair corrupted Windows files.

Run DISM first to repair the Windows component store, then SFC to scan protected system files.

DISM then SFC

DISM /Online /Cleanup-Image /RestoreHealth
sfc /scannow

What good output looks like

DISM should finish with a successful operation message. SFC may report no violations, successful repairs, or files it could not repair.

If SFC cannot fix everything

Restart, run the pair again once, then check the CBS log or request support. Repeated corruption can point to disk, RAM, update, or malware problems.

Disk repair

Check storage without making the problem worse.

Online disk scan first

chkdsk C: /scan

Repair disk errors on next restart

chkdsk C: /f /r

Data warning

If the drive clicks, disappears, shows SMART failure, or contains irreplaceable files, stop and back up or use professional recovery. Heavy disk repair on a failing drive can reduce recovery chances.

Internet repair

Reset DNS, IP, and network stack.

DNS and IP refresh

ipconfig /flushdns
ipconfig /release
ipconfig /renew

Winsock and TCP/IP reset

netsh winsock reset
netsh int ip reset
shutdown /r /t 0

Restart is important after Winsock/TCP/IP reset. If the problem returns, inspect drivers, VPN software, proxy settings, router firmware, and ISP status.

Windows Update

Reset update services after basic repair fails.

Use only after the troubleshooter, restart, DISM, and SFC do not solve the update problem.

Reset Windows Update components

net stop wuauserv
net stop cryptSvc
net stop bits
net stop msiserver
ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
ren C:\Windows\System32\catroot2 catroot2.old
net start wuauserv
net start cryptSvc
net start bits
net start msiserver

Boot recovery

Use boot repair only from Windows Recovery Environment.

Important

Boot commands can affect startup records. If BitLocker is enabled, confirm the recovery key first. If data is critical, back up before changing boot files.

Legacy/BCD boot repair checklist

bootrec /fixmbr
bootrec /scanos
bootrec /rebuildbcd

UEFI BCD rebuild pattern

diskpart
list volume
select volume <EFI_VOLUME_NUMBER>
assign letter=S:
exit
bcdboot C:\Windows /s S: /f UEFI

Goal	Command	Use when	Caution
System files	`DISM` + `sfc`	Windows feels corrupted, apps crash, update errors	Run as administrator and let scans finish
Disk	`chkdsk C: /scan`	Disk warnings or file-system errors	Back up first if drive health is questionable
DNS/IP	`ipconfig /flushdns`	Websites fail, DNS errors	Does not fix ISP or router outage
Network stack	`netsh winsock reset`	Broken connection after VPN/malware/driver changes	Restart required