Find cmd.com right click choose run as admin then type these lines some may not apply it should then reboot its resetting the netwrk as often AV doesnt clear the network

netsh advfirewall reset
netsh advfirewall set allprofiles state ON
ipconfig /flushdns
netsh winsock reset catalog
netsh int ip reset c:\resetlog.txt
ipconfig /release
ipconfig /renew
netsh int ipv4 reset
netsh int ipv6 reset
bitsadmin /reset /allusers
reg delete HKLM\SOFTWARE\Policies\Microsoft\Windows\IPSec\Policy\Local /f
reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\IPSec\Policy\Local /f
netsh interface ipv6 6to4 set state state=disabled undoonstop=disabled
netsh interface ipv6 isatap set state state=disabled
netsh interface teredo set state disabled
netsh interface tcp set global autotuning=disabled
reg add hklm\system\currentcontrolset\services\tcpip6\parameters /v DisabledComponents /t REG_DWORD /d 0xFFFFFFFF
for /F "tokens=*" %%a in ('wevtutil.exe el') DO wevtutil.exe cl "%%a"
shutdown -r