Install Internet Protocol Version 4 (TCP/IPv4) on Windows 7
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
/3. Control Panel->Network Connections->Local Area Connection->Properties
Install protocol. Press Install button, select protocol, type Windows Inf path.
Select IPv4 protocol. (Unblock IPv4 uninstall button.)
Uninstall IPv4.
/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
/5.Reboot
/6. Install IPv4
/7. Reboot!
/8. Restore %windir%\inf\Nettcpip.inf
/*. See too Re-installing WAN miniport devices
From the Device Manager, navigate to Network Adapters and expand the tree. Right click and uninstall the ethernet card and reboot. Windows should autodetect the card and reinstall the appopriate drives. This should re-enable IPv4.