Unsolved error. BOOTMGR image is corrupt.

[Brownbeard]

Hello fellas, Good day!
Can you help me with my issue. "BOOTMGR image is corrupt. The system cannot boot."
I have a laptop HP Probook 6560b, I upgraded my hardware(RAM & HDD).
RAM- from 4gb(2pcs 2gb),1333mhz ddr3 to 8gb(1pc),1600mhz ddr3.
HDD- from 250gb to 1tb.

First I remove and replace my old RAMs. And my computer seems fine since I used my computer to create a bootable device. After I finished creating a bootable device I replace my old HDD and install an OS(windows 7 pro). I follow the steps properly: select a country and a language,accept term and condition, do a partition until I wait for the final steps: Copying Windows Files, Expanding Windows Files, Installing features, Installing Updates, and Completing Installtion. Before the progress bar in "Completing Installtion" part finishes my computer needs to restart. Then this stressful ERROR occured, my computer did not load to windows logo, instead it prompts a message "BOOTMGR image is corrupt. The system cannot boot."

To troubleshoot the issues.
*I tried installing other OS (Win 8.1, Win 10) and still I have the same error.

*I have done installing OS in my new HDD using other computer and the installation is successful without any flaws.

*I have used my new RAM(alone) with my old HDD and it is running good.

*I checked my laptop's supported RAM and HDD in HP website. it supports up to 32gb RAM(2pcs 16gb) and 750gb HDD.

  Since my new HDD is 1tb, I try my other 500gb HDD(good) just to checked if the issues arise from HDD compatibility. I      installed an OS in my computer with my 500gb HDD then BOOM!!! same ERROR!!!

*I already changed boot mode in BIOS from legacy to UEFI and vice versa.
*I already changed SATA device mode from IDE to AHCI and vice versa.
*I already restore my BOIS to default settings and Reset BIOS security to factory defaults.
*I already checked current date and time in BIOS.

Can anyone tell me where is the problem.
1.My laptop is good since it boots when I use my old hardware.
2.My new HDD is good since OS will successfully installed when using other computer.
3.My new RAM is good since it runs using my laptop with my old HDD.
4.My OS is good since it is genuine.

Note 1: I have brought my laptop to 3 technician and 2 programmers but none of them can solve the issue.
note 2: I need to upgrade my RAM cuz I have heavy works.
note 3: I need to replace my OS to x64 cuz my 8gb RAM would be a waste since my OS in my old HDD is x32.

Please help me guys.. any solution is much appreciated.