French security researcher firm Vupen claim to have already developed a reliable windows 8 exploit, just days after the launch of latest edition of Microsoft's flagship operating system.The sometimes controversial firm, which sells the exploits it develops to Western government agencies and deliberately avoids sharing vulnerability details with vendors, said that the exploit it has cooked up allows it to take over Windows 8 machines running Internet Explorer 10."We welcome #Windows 8 with various 0Ds combined to pwn all new Win8/IE10 exploit mitigations,” Vupen’s chief exec Chaouki Bekrar boasted in a Twitter update.Windows 8 offers improved