Samsung SSD 840 EVO boot problem

Now that I see your Disk Manager Image from post 8, I apologize as I was wrong (post 6)
The only boot able disk (active) is disk 0.
Data disk 1 has no active sector.
In other words, everything is correct and should be working.

In a Legacy - MBR BIOS:
- You will see all disks (boot able or no boot able) under SATA devices.
- You may not see non boot able disks under boot options.

As BIOS doesn't always show your SSD and the win 7 installation doesn't find it, I would say that you have a SSD failure.

Put the disk on desktop that has a Windows.
Open Disk manager and on the SSD delete all partitions - Don't create new. Leave it RAW. (If it doesn't see the SSD, you have a SSD failure)
On the Laptop, put the SSD on SATA 0 and remove the HDD.
Try to install Win 7 on it.

If the installation doesn't see the SSD, I would say it has a failure.
Remember, Samsung EVO 840 SSD has 5 years warranty.

Hello ,
i have the same problems with an Samsung EVO 1TB .
It working perfectly to store anything (i tested him in my main pc and my Toshiba laptop)

but

1) It refuse to upload Windows , 7 , 8.1 from bootable usb stick and 10 from bootable dvd .
2) It have the same behavior in my main (well working with old Kinston 64GB, Gigabyte DDR3, Intel i3, 16GB ram) pc when i put Samsung SSD in place of Kingston. Messing up Bios until disconnect it.

and in my new (Gigabyte DDR4 , i5 , 8GB Ram) that i had the idea to create with Samsung as bootable disc.

I lost many hours from my life for that Samsung trash and any samsung warranty can compensate.

Tomorrow i will ask , using warranty, a repair or money refund.

Was the first and the last time in my life ,that i bought Samsung products. Korean products are by far the worst in global markets.

As i understand from all previous messages , these SSDs are constructed with unsurpassed problems.