Dual booting Alienware17 win8.1 + win7

After I read everything on the subject of dual boot Windows and application of the same, I was unable to install windows 7 on preinstalled Windows 8.1, and ask for help from the community.
Laptop Alienware 17x with 80 GB SSD mSATA drive, 1TB disk where the OS was and who was moved with a program Paragon to the new purchased 250 GB SSD.
So, now is the OS on the 250 GB disk, all data on 1TB, a 80GB SSD is empty. On 1TB are still Recovery and OEM Partition. The 1TB and 250 are GPT / NTFS. WIndows 7 I try to install on 80GB HDD mode GPT / UEFI, MBR / Legacy, FAT32 / NTFS, but nothing passes. It appears the error 0X80300024. I tried to remove the 250GB drive, but the error is the same.
Does anyone have any idea?

 

Do you have a system partition, usually 100MB

Try removing all other drives from the system first.

At the bottom of this page there are other links too: Installing Windows 7 Ulti 64bit on SSD in a Laptop, error 0x80300024 Solved - Windows 7 Help Forums

 

Addendum,

If you have W8x on UEFI/GPT setup you will need to make a UEFI bootable W7 media. Rufus - Create bootable USB drives the easy way

 

Tnx RCB,

I tried take out 250 GB disk and remain only with empty mSATA 80GB drive (which can not take out) and 1TB disk with data and hidden OEM partitions.
I also have two sets of installation UEFI / GPT and Legacy / MBR.
On both the same error.

 

If I remember correctly, Dell's W7 (pre W8) didn't come with a system partition (which is needed for dual boot).

Usually it is called a System Reserved (MBR partition) and is min. 100MBs.

There is also some problems with that partition being to small and needing to be 200-400MBs for dual boot.

I don't want to run you around because I can't say absolutely. I'm just hoping maybe I could give you some pointers to help search out the problem.

Let us know when you get a little more info and we'll see where to look next.

 

Windows 7 Forums is the largest help and support community, providing friendly help and advice for Microsoft Windows 7 Computers such as Dell, HP, Acer, Asus or a custom build. - Search Results for dual boot win 7 win 8

Win 7 + win 8 dualboot problem Solved - Windows 7 Help Forums

Best place to figure out stuff like this. Lots of different types of computers/setups.