I cant access websites from Internet explorer or safari, also windows updates, live update and other antispyware programs cant access the internet. But i can ping websites in command prompt. What may be causing this?

Have you tried to turn off your fire wall? Also run a anti Spyware to see if there is any spyware infections. Want A Weekly Update on Latest System Security Problem http://www.systemsecurityinstitute.org

Try this , First reset modem\router . shut down the PC , disconnect the mode\router........from everything , take a ball point pen and insert it gently in the small hole at the back , depress for 15 seconds , the put the power jack in first , next the DSL line, wait until the led stops flashing and then plug in the computer\s and boot . next flush dns , this will resolve a corrupt dns folder start>search>type cmd> right click " command " and run as admin . type cd\ and press enter next at the prompt type ipconfig /flushdns c:\>ipconfig /flushdns If you have a copy of HostsXpert , select MS default , if you don't have a copy , then copy across with cd or usb . And lastly winsock reset , as above from an elevated command prompt cd\ >press enter , from c:\> netsh winsock reset c:\>netsh winsock reset and then press enter At the first opportunity run a quick scan of MalwareBytes Anti Malware , how to down load this properly can be found on posts answered by Jabuck on the Security and Virus Forum of this site. .............. ...................

i previously tried turning off firewall, even uninstall it, tried malwarebyte anitspyware, superantispyware, spybot, avg, combofix, winsockfix, vundofix, none worked. did a sfc scan, tried other web browsers, connect via both wireless and lan, nothing worked, so have done system recovery. And running windows updates now. To me seems some windows file has wrong settings, and i couldnt find what file.

View host file. If you can ping then try that ip address in the browser also. "Best Practices", Event viewer, host file, perfmon, antivirus, anti-spyware, Live CD's, backups, are in my top 10

ended up formatting pc