how to get back to windows 8.1

I have been running windows 8.1 and the other day I downloaded  windows 10, and created a partition on my hard drive and then installed windows 10 on that partition.  everything went fine, except that now I cannot get back into windows 8.1.  When windows 10 starts up it gives me now option to go to windows 8.1.  I have had duel os's on the same hard drive in the past and I have always had the option to choose which os to load to.  
I can see the partition that windows 8.1 is on and all my files are on that partition, so I know that I have not wiped that partition.
   Any help would be appreciated,  Thanks.
Will Schmidtowner Asked:
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rindiCommented:
Use EasyBCD to change your boot options:

http://neosmart.net/EasyBCD/

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Will Schmidtowner Author Commented:
I downloaded and installed the app that you sent to me but it only sees one bootloader.  Here is the info it gave:


There is one entry in the Windows bootloader.
Default: Windows Technical Preview
Timeout: 30 seconds
Boot Drive: K:\

Entry #1
Name: Windows Technical Preview
BCD ID: {current}
Drive: C:\
Bootloader Path: \Windows\system32\winload.exe

I still cannot get into windows 8.1
rindiCommented:
Then you did something that has really borked your Windows 8.x installation. You might be able to repair it using paragon's rescue kit, but I doubt it will help. You will probably have to re-install Windows 8.x from scratch.

http://www.paragon-software.com/home/rk-free/download.html
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Will Schmidtowner Author Commented:
Here's what I did:  In windows 8.1 I went to disk management and created a partition to install windows 10.  Then I put the disk in and re-started the computer, selected the partition that I had created, formatted it and installed the operated system.
I have done this before with other OS'S (Windows XP, Windows Vista, Windows 7, and Windows 8) and never had a problem.
rindiCommented:
If it had gone fine, you'd be able to add Windows 8.1 to the boot menu using easybcd. You must have done sonething that at some time or another that broke your Windows 8.x installation, or easybcd would be aable to find W81 and add it to the boot menu.
Will Schmidtowner Author Commented:
I am going to try re-installing on a different hard drive the windows 10.  I attempted this operation the second time and it did the same thing.  Thanks for your help
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