Recently ,some iphone users find out that iphone could not be able to synchronize with PC under window 7 operating system ,the major reason comes from intel P55Express chipset .If users with the Intel P55Express chipset install window7 operating system,Iphone can not be achieved with the PC sync and give error "error0xE8000065" .it is not the problems of windows 7 ,but the P55Express chipset .how to sovle this problem? there are many methods .you can change your CPU. but it looks expensive .The wise choice maybe using some sync softwares (you can download from this site :www dot itoolkit-software.com )