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Tech Support - Common Command Line

1. Click Start - Run or Start - Accessories - Run.
2. Type: cmd
3. Hit the Enter Key.

You can then type the following commands:

INTERNET CONNECTIVITY

Test TCP/IP Connectivity and DNS Resolution:
ping yahoo.com

Test TCP/IP Connectivity
ping 69.147.114.224

Test DNS Resolution:
nslookup 69.147.114.224

If Internet Connectivity Is Down, Identify Hop Location:
tracert yahoo.com

View and/or Change Microsoft StartUp Configuration:
msconfig

Release TCP/IP Address:
ipconfig /release

Renew TCP/IP Address:
ipconfig /renew

Flush DNS Cache:
ipconfig /flushdns


INTERNET / NETWORK CONFIGURATION
The following commands may require a reboot using Start - Shutdown - Restart after the command has been executed:

Reset TCP/IP Protocol to Default:
netsh int ip reset c:\resetlog.txt

Reset Winsock Catalog to Default:
netsh winsock reset catalog

Reset Winsock to Default:
netsh winsock reset

Reset Proxy Server to Default:
netsh winhttp reset proxy

Reset Firewall to Default (Windows XP):
netsh firewall reset

Reset Firewall to Default (Windows Vista/Windows 7):
netsh advfirewall reset

Reset IPv4 to Default:
netsh interface ipv4 reset

Reset IP Address to Default (DHCP):
netsh interface ip set address "Local Area Connection" dhcp

Reset DNS to Default (DHCP):
netsh interface ip set dns "Local Area Connection" dhcp

Reset WINS to Default:
netsh wins reset


MICROSOFT NETWORK CONNECTIVITY

Test NETBIOS/WINS Resolution Using Hostname:
nbtstat -a [LAN Hostname]

Test NETBIOS/WINS Resolution Using IP Address:
nbtstat -A [LAN IP Address]

Test Microsoft Sharing Connectivity:
net view \\[LAN Hostname]


MALWARE REMOVAL

Malicious Software Removal Tool
mrt


SYSTEM FILE INTEGRITY

System File Checker
sfc /scannow
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