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Install Internet Protocol Version 4 (TCP/IPv4) on Windows 7


I can not explain what has happened, just suddenly I lost my internet connection. On local area connection properties IPv4 is not installed, my ISP says that they only support IPv4. Then I must had it because I had connection before. What could happen to lose IPv4? And how to install it back?


Thank you.



Answer



way 1:


Run cmd as Administrator. Run command:


netsh interface IPV4 uninstall

Wait 2-3 minutes, run:


netsh interface IPV4 install

way 2:


Run cmd as Administrator. Run command:


resets WINSOCK entries to installation defaults


netsh winsock reset catalog

resets IPv4 TCP/IP stack to installation defaults:


netsh int ipv4 reset reset.log

or


netsh int ip reset reset.log

need reboot


way 3:


Run ncpa.cpl as Administrator.


Right-click the network connection which you are using, and then click Properties.


Click on Internet Protocol TCP/IPv4.


Click Install then.


Click Protocol, and then click Add.


Click Have Disk.


Type the location as %windir\inf%, example: C:\windows\inf and then click OK.


On the list of available protocols, click Internet Protocol (TCP/IPv4), and then click OK.


way 4:


wmic nicconfig get MACAddress, IPAddress, ServiceName, Caption, IPEnabled, SettingID | find /I "Realtek"

Get NIC GUID and del HKEY_LOCAL_MACHINE\SYSTEM\ControlSet00x\Services\{GUID} in registry.


wmic nic get Caption, PNPDeviceID, ServiceName, NetConnectionStatus | find /I "Realtek"

Get NIC PCI ID: PCI\VEN_XXXX&DEV_YYYY&SUBSYS_ZZZZZZZ&REV_TT and del HKEY_LOCAL_MACHINE\SYSTEM\ControlSet00x\Enum\PCI\VEN_{PCI_ID} in registry.


If it is difficult steps to improve law, registry entries, and then override the owner can use the Windows Driver Kit (WDK) 7.1.0.


Run regedit with SYSTEM rights.Need Windows Driver Kit (WDK) 7.1.0:


ntsd -c qd regedit

Scott Chamberlain (c), good comment!:


You can run regedit with SYSTEM rights by using PSExec too, much smaller download. One of the examples they post is running regedit as SYSTEM.


psexec -i -d -s c:\windows\regedit.exe

Reboot!


way 5 (apply if in a pinch, if the previous methods did not help):


/1. Back up Registry /2. Edit file %windir%\inf\Nettcpip.inf in [MS_TCPIP.PrimaryInstall]


comment string ;:


;    Characteristics = 0xA0 ; NCF_HAS_UI | NCF_NOT_USER_REMOVABLE

and add


Characteristics = 0x80

Nettcpip.inf ipv4 enable Uninstall


/3. Control Panel->Network Connections->Local Area Connection->Properties


enter image description here


Install protocol. Press Install button, select protocol, type Windows Inf path.


enter image description here


Select IPv4 protocol. (Unblock IPv4 uninstall button.)


enter image description here


Uninstall IPv4.


enter image description here


/4. delete registry key:


HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Winsock
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Winsock2

if need, delete registry key:


HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\tcpip
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\dhcp
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\dnscache
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\ipsec
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\policyagent
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\atmarpc
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\nla

enter image description here



enter image description here


/6. Install IPv4


enter image description here



enter image description here



/*. See too Re-installing WAN miniport devices


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