we have 8 computers in LAN. these 8 systems get internet through switch which is connected to modem. From last few days my internet is not working properly like if i type any url it wont connect, some times it goes in to search page and rarely it works. i gave complent to my internet provider 3 times all the time he says its ok please chk ur systems. i dont know whether a spy ware, malware or virus, i have avira anti-virus. if i give ping from my DNS is also nice. all systems in my network faces same problem, good news for me is our office msngrs and ftp sites, torrents work properly. But, if we type url in any browser problem comes forward. Please any body help me out what to do.