After installation Windows 8.1 not booting


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.

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?
> Are you installing win 7 and win 8.1 is same partition?

> During the reboot, try pressing F8 to see if any option regarding Win 8.1 is visible.


thanks everyone for valuable reply, i was able to solve the problem by taking help from windows 7 without 100 MB partition topics & i reinstalled windows 7 but at the time & keyboard input screen i used diskpart from command prompt ( Shift + f10 ) & created 500 mb (100mb for 7 + 350 mb for 8.1 + some extra space) partition & made it active then everything gone smoothly.

if anyone having problem (dual boot 7 & 8.1) then following steps may find helpfull
At the first setup screen (Language, Keyboard, etc.) press SHIFT+F10. This will open a command prompt window. Enter the following diskpart commands to create a partition.
List disk
(this command is important. It will show you what disk drives you have. Most likely your hard drive will be will be Disk 0, but you need to check it first.)
select disk 0
create partition primary size=500
(this creates a partition 500MB in size. If you want to use the whole hard drive, just leave off the size=number)
select partition 1
format fs=ntfs quick
Type Exit to leave Diskpart. Type Exit to close the command prompt. Now continue with the install.
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