Windows TCP/IP Stack Reset

ipconfig /flushdns
nbtstat -R
nbtstat -RR
netsh int ipv6 reset
netsh int ipv4 reset
netsh winsock reset
Reboot

If want to restore WMI repo (good thing sometimes)

net stop wscsvc
net stop vmms
net stop "IP Helper"
net stop winmgmt
move %windir%\System32\wbem\Repository %windir%\System32\wbem\RepositoryBackup
net start winmgmt
for /f %s in ('dir /b *.mof') do mofcomp %s
for /f %s in ('dir /b en-us\*.mfl') do mofcomp en-us\%s