Windows 7: dns & dhcp not working in windows

after i upgraded vista to windows 7, i now have a problem that my internet is not working,i can ping external ips but no address resolution and if i made the connection to auto ip ...doesn't work.so that's dhcp & dns are not working.when i check in the services.msc the dhcp and dns services are running .if i booted windows in safe mode with networking, everything is working.so can you help me pleaaase,really need ur help guys.


thanks in advance.

Did you go to the adapter and check the configuration to make sure it wasn't static.
Try going to the command interface and type ipconfig /flushdns

Sometimes when upgrading from Vista to Windows 7 winsock needs to be reset in order to get your browser back online again. Try using the following commands to fix the problem.

1. Click start, type cmd in the Start Search box, right-click cmd.exe, click Run as administrator, and then press Continue.

2. Type netsh winsock reset at the command prompt, and then press ENTER.

Note If the command is typed incorrectly, you will receive an error message. Type the command again. When the command is completed successfully, a confirmation appears, followed by a new command prompt. Then, go to step 3.

3. Type exit, and then press ENTER. You should be prompted to reboot, if not you should reboot and test.

thanks all for replying

@chev65:
netsh winsock didn't work

@kn0c
there is no prob with the adapter nor ipconfig
and it's not only the dns ,it's the dhcp also

btw the dhcp &dns services are running and i uninstalled the antivirus just in case

stupid question time, is the DNS configured in the router or the PC? and are you SURE your DNS servers arent down

yes sure and i use another laptop with the exact dns servers and dhcp

Have you tried running the command sfc /scanow ?

Windows 7 has zero problems with DHCP or DNS server so the problem is coming from somewhere else.

If that doesn't work I would go with a clean install of Windows 7 because upgrades can be very problematic.