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Cannot boot into Win7 installer. "insert proper boot media" and "flashing unders

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#1 letthisnightexplode


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Posted 11 March 2014 - 03:27 AM

I'm trying to do a fresh install of Windows 7 Ultimate 64bit but i can't get the installer to load.

I have access to a Xubuntu install and a OS X install.

The original hard drive Windows 7 was installed on stopped working completely. So, I've bought a brand new one.

I followed the steps I did the first time I installed Windows 7 - converting the iso to and img with OS X's hdiutil and the dd command to burn it to a USB.

This time I would just get a "please insert proper boot media" error.

I went to my Xubuntu computer (it's used like a chromebook - i'm not a big linux guy) and tried WinUSB.

These USB keys lead to a screen that had a flashing underscore a few spaces from the top of the screen.

It dawned on me that the first thing I did when I installed windows the first time was update the bios. So I tried flashing a few different BIOS versions, but none of them made a difference>

I really need help - I can't think of anything else to try

Thank you very much!


Cannot boot into Win7 installer. OS X made USB keys show "insert proper boot media" - Ubuntu made keys show "flashing underscore" - Tried 3 different BIOS versions. Win7 -has- worked here before...



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#2 Chris Cosgrove

Chris Cosgrove

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Posted 15 March 2014 - 07:06 PM

In my experience a blank black screen with a flashing underscore means that the computer cannot find a bootable drive.


If you are trying to boot from a memory stick, go into the BIOS at start-up and make sure that 'USB drives' are the first item in the boot priority list, if you are booting from a Windows DVD, then make sure that your optical drive is first in priority. This may well solve your problem.


Chris Cosgrove

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