1.    31 Dec 2015 #1
    Join Date : Dec 2015
    Posts : 1
    Windows 10

    cannot locate operating system

    My dell 7500 has windows 7(C: drive) and windows 10(F: drive) installed on the single internal HDD. It also has three USB disks used only for data. When I boot I get a message saying that an operating system cannot be found and I should try unplugging my USB drives and then reboot. When I unplug the USB drives and re boot, it finds the windows systems and finishes the boot process with no trouble.
    Checking the BIOS shows only the CD-Rom drive and the three USB drives are listed in the boot order and the drive listing. I then deactivated the "boot from USB drives" item in my BIOS and then the computer boots fine.
    Also, I have been experimenting with Ubuntu on a USB pen drive but have removed it. I suspect that there are some parts of grub hanging around.

    Why can't the bios find my internal HDD which contains the two Windows systems?
      My System SpecsSystem Spec

  2.    31 Dec 2015 #2
    Join Date : Oct 2013
    Posts : 2,014
    Windows 7

    You have to get your BIOS boot sequence right. CD ROM as first and then the HDD from which you want to boot. Make sure it contains the bootmgr.
      My System SpecsSystem Spec


Similar Threads
Thread Forum
Missing operating system
I am using build 10130 NL, today I got update to build 10240. After the update I have the problem "Missing operating system" . Anyone who know what is going wrong. I am using a ASUS X77J series laptop with SSD drive. Looking forward to some advice,...
Installation and Setup
No internet and no operating system
Not sure what to do. I did find a page to uninstall Win 10, but I'm not sure it would do it correctly without the internet. I'm not even sure if it would work because I was afraid to try it. I was hoping you could give me some ideas before I took...
Installation and Setup
No Operating System Found (Please Help)
Ok, so a while back when the Windows 10 Upgrade had popped up on my computer, I upgraded with no problem at all. I wanted to do a factory restore in order to clean up my laptop completely, however while updating, the power went out and the computer...
General Support
How do I move my operating system to a SSD.
So hey guys I am looking forward to replace my laptop HDD with a SSD. My laptop is the Toshiba Satellite l70 pro 17.3". I have a basic idea of doing transferring windows 8 to an SSD but apparently it is harder to transfer Windows 10 to a SSD when...
Installation and Setup
Your next operating system: Your datacenter
Read more: Your next operating system: Your datacenter | ZDNet
Windows 10 News
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd
All times are GMT -5. The time now is 06:16.
Find Us
Twitter Facebook Google+

Windows 10 Forums