Windows 7 installation

[Velanor]

So i have a Lenovo laptop that came with pre-installed Windows 8.1. I wanted to do a clean install of Windows 7 since i dont like windows 8. I' ve loaded windows 7 on a bootable usb stick but after i press install now this message appears '' A required CD/DVD drive device driver is missing''. I know it's not the usb that causing the problem since its working on another computer. What can i do to continue the installation?

 

[Rabmac]

Does your laptop have UEFI or BIOS?

 

[13thmonkey]

try 10

 

[Velanor]

Yes, i' ve changed to ''usb legacy support'' and ''legacy first'' options in BIOS but no luck. I' m also using a usb 2 port. I think that this error is related to SATA/RAID drivers but i don't know how to load them during the installation.

 

[techguy911]

have you turned off secure mode in bios?

 

[Velanor]

have you turned off secure mode in bios?

I don't think so, i ll give it a try and let you know.