I tried to install OS from several windows 8.1 iso (after writing them into dvd) but when all unpacking & installations completes & PC restarts one final time PC directly boot from windows 7 it neither show windows 8.1 option nor it finalise installation (final step where we insert PC name after rebooting the PC). i wanted to make make dual boot Windows 7 & 8.1 but after restart setup does not continue. Steps 1> First i installed Windows 7 Ultimate Sp1 X64 during that installation 100 mb system partition gets created 2> but during windows 8 installation 350 Mb partition does not get created by 8.1x64 OS setup but setup does not show any error 3> setup went smoothly & copied file & installed features & reboot but after reboot it directly went to the windows 7 desktop not in windows 8.1 bootloader. but in vmware it went perfectly fine only with one 100mb partition. plz friend tell me how can i solve this problem?