Desktop Operating Systems and Recovery

Hi,

I just bought a new PC From HP : an Pavilion 550-113a with the following config :

Motherboard : Odense (Pegatron)

Processor :       Intel Core i7-6700

RAM :                  8GB (DDR3-1600)

Video :                NVIDIA GeFORCE GT 730

The PC is delivred with Windows 10 installed on a 1 TB Normal harddrive

I replaced the installed Disk by a New SSD Kingston 240 GB (SATA III)

I changed to legacy mode booting, and disable secure boot

I Booted on the Microsoft Windows 7  X64 SP1 DVD, using the USB HP Keyboard and mouse delivred with the PC.

The operating system is loading well and when appear the bitmap screen asking wich language , which keyboard to select, my mouse is not working (but the red light is working underneath) nor my keyboard and I am unable to continue the installation.

I have tried  with a USB logitech keyboard+mouse (wired) / Lenovo KB + mouse (wireless) : Same issue (power still there as the light on the KB and mouse still lit).

I have tried all USB port 2.0 and 3.0 as well as the internal ones, all working except when get to the language selection page.

Does anyone has a clue how to have the mouse and the keyboard recognised by the Windows7 ?

Many many thanks for your help, as I need to use Win 7 for my work software.